08-20-2016, 08:27 AM
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#1
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Location: Nebraska
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HELP!!! Rear Tailgate, Cruise Control Issues
Since my little fender bender, I've had issues with the rear wiper, defogger, rear window, and cruise control. Some days they work and I have no problems, other days I have nothing. One day while driving they would work until I would drive around right curves in the road.
It's NOT the window lock, it's NOT a fuse, and checking the wiring harness between the body and the hatch and there is some cracked insulation on the wiring, but it's been covered since before I've owned the vehicle. Would that cause my problems? I'm at a loss. I believe it's a wiring issue. I just don't know where at, and reading wiring schematics is a bit of a weak point for me. I'm hoping someone can point me in the right direction.
Thank you,
Huerta
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Huerta
"Black Burro" 2000 4Runner SR5, e-locker, Tundra/906 lift, Tundra brakes, 348K
"Fez Johnson (FJ)" 1997 Land Cruiser 40th Anniversary, Antique Sage, triple locked, 195K SOLD
"4-Lo Silver" 2010 4Runner Trail, bone stock, 178K, Lovin' it
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08-20-2016, 10:08 AM
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#2
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Junior Member
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Join Date: Nov 2015
Location: Michigan
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Junior Member
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Location: Michigan
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Maybe a bad ground
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08-20-2016, 10:31 AM
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#3
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Senior Member
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Join Date: Dec 2013
Location: Covina, CA
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Quote:
Originally Posted by jhuerta22
Since my little fender bender, I've had issues with the rear wiper, defogger, rear window, and cruise control. Some days they work and I have no problems, other days I have nothing. One day while driving they would work until I would drive around right curves in the road.
It's NOT the window lock, it's NOT a fuse, and checking the wiring harness between the body and the hatch and there is some cracked insulation on the wiring, but it's been covered since before I've owned the vehicle. Would that cause my problems? I'm at a loss. I believe it's a wiring issue. I just don't know where at, and reading wiring schematics is a bit of a weak point for me. I'm hoping someone can point me in the right direction.
Thank you,
Huerta
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There is no single fuse for all those systems, so you are correct, it is not a fuse. With the exception of the cruise control, all the other systems are in the back door. And there is a connector that affects all those systems, not just the harness can be a problem, but the connector itself.
The rear window and wiper are connected to the Back door ECU, which is in the door. The defroster is operated by the Body ECU, which is in the dash.
The ground point for the wiper motor and Back door ECU is in the left 1/4 panel area.
I would start with the "connection" to the back door. Then I would double check the connection. If that didn't work, I'd TRIPLE check that connection. If that still doesn't work. Call me!
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1989 FJ62 5.3 Chevy, FZJ80 Axles, 4.88's with ARB.
2000 2wd runner, 4 cylinders, yes it IS slow.
1999 4WD SR5 Desert Dune 3.4 351K and counting.
2000 4WD sport 3.4 Elocker <--My son's but I still end up paying.
2001 2WD SR5 3.4 <-- My daughter's...see preceding line.
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08-23-2016, 11:41 AM
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#4
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With the power switching on and off like that, is there any possibility of it being a bad ground?
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Huerta
"Black Burro" 2000 4Runner SR5, e-locker, Tundra/906 lift, Tundra brakes, 348K
"Fez Johnson (FJ)" 1997 Land Cruiser 40th Anniversary, Antique Sage, triple locked, 195K SOLD
"4-Lo Silver" 2010 4Runner Trail, bone stock, 178K, Lovin' it
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08-23-2016, 08:24 PM
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#5
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Senior Member
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Quote:
Originally Posted by jhuerta22
With the power switching on and off like that, is there any possibility of it being a bad ground?
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Of course, well actually a "poor" ground. If it intermittently makes a good contact then loses it. I'm not thinking it's anything but the connector though.
Did I mention the connector?
__________________
1989 FJ62 5.3 Chevy, FZJ80 Axles, 4.88's with ARB.
2000 2wd runner, 4 cylinders, yes it IS slow.
1999 4WD SR5 Desert Dune 3.4 351K and counting.
2000 4WD sport 3.4 Elocker <--My son's but I still end up paying.
2001 2WD SR5 3.4 <-- My daughter's...see preceding line.
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08-24-2016, 09:38 AM
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#6
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Quote:
Originally Posted by IBallEngineer
Of course, well actually a "poor" ground. If it intermittently makes a good contact then loses it. I'm not thinking it's anything but the connector though.
Did I mention the connector?
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Hahaha! I gotcha. So it's more than likely the connector in the tailgate. Would using contact cleaner be the first step? When looking at the connector all the wires look like they're in good shape and they're all snuggly in place. Dirty contact points?
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Huerta
"Black Burro" 2000 4Runner SR5, e-locker, Tundra/906 lift, Tundra brakes, 348K
"Fez Johnson (FJ)" 1997 Land Cruiser 40th Anniversary, Antique Sage, triple locked, 195K SOLD
"4-Lo Silver" 2010 4Runner Trail, bone stock, 178K, Lovin' it
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08-24-2016, 11:01 AM
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#7
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Senior Member
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Join Date: Dec 2013
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Quote:
Originally Posted by jhuerta22
Hahaha! I gotcha. So it's more than likely the connector in the tailgate. Would using contact cleaner be the first step? When looking at the connector all the wires look like they're in good shape and they're all snuggly in place. Dirty contact points?
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I've never actually seen the connector, but it is INSIDE the body, not in the tailgate. The issue may be corrosion, it may just not be connected properly. The consensus here is that it is prone to bad connection by design. And if you read enough threads about rear door problems, the connection has been the fault the majority of the time. If you check the connector and it is not dirty or damaged, and is connected properly. We can check individual wires for power and ground if you have a multi-meter.
Did I mention the connector?
__________________
1989 FJ62 5.3 Chevy, FZJ80 Axles, 4.88's with ARB.
2000 2wd runner, 4 cylinders, yes it IS slow.
1999 4WD SR5 Desert Dune 3.4 351K and counting.
2000 4WD sport 3.4 Elocker <--My son's but I still end up paying.
2001 2WD SR5 3.4 <-- My daughter's...see preceding line.
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08-24-2016, 11:30 AM
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#8
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Join Date: Mar 2016
Location: North Texas
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I have a back door ECU and harness that came off a 99 door if you need it (shipping cost only). Just shoot me a PM and I can send you picture.
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-2005 4Runner Limited V8 AWD - Toytec Boss Suspension, SPC UCAs, 285/70/17 Level 8 MK Wheels (17x8, -10), Tandem Rock Sliders
-1998 LX470 (Stock)
www.KeenanOffroadFab.com
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08-24-2016, 11:42 AM
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#9
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Quote:
Originally Posted by IBallEngineer
Of course, well actually a "poor" ground. If it intermittently makes a good contact then loses it. I'm not thinking it's anything but the connector though.
Did I mention the connector?
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In another car I had a ground (for a hall effect sensor) that went from the distributor to the firewall that had separated but was hanging down via gravity juuuust right so that the car would start and run... but whenever you tried to accelerate or take a corner, the car would cut out due to the loose ground disconnecting from the distributor side thanks to g-forces.
Sounds like something similar could be happening in the OP's rig. Where possibly the wire broke away from the connector but is close enough to intermittently make connection but when he turns the wire gets disconnected?
Something about a connector?
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'98 4Runner Limited 4x4 not stock.
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08-24-2016, 02:34 PM
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#10
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Quote:
Originally Posted by IBallEngineer
I've never actually seen the connector, but it is INSIDE the body, not in the tailgate. The issue may be corrosion, it may just not be connected properly. The consensus here is that it is prone to bad connection by design. And if you read enough threads about rear door problems, the connection has been the fault the majority of the time. If you check the connector and it is not dirty or damaged, and is connected properly. We can check individual wires for power and ground if you have a multi-meter.
Did I mention the connector?
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I believe you have mentioned the connector, but I'll keep it in mind! Hahaha! So the location of the connector IN the body is what I need to find. I guess I'll see what I can tear apart and find and I'll get back with info/pics soon!
__________________
Huerta
"Black Burro" 2000 4Runner SR5, e-locker, Tundra/906 lift, Tundra brakes, 348K
"Fez Johnson (FJ)" 1997 Land Cruiser 40th Anniversary, Antique Sage, triple locked, 195K SOLD
"4-Lo Silver" 2010 4Runner Trail, bone stock, 178K, Lovin' it
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08-24-2016, 04:43 PM
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#11
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Elite Member
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Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
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Real Name: Jerod
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Quote:
Originally Posted by jhuerta22
I believe you have mentioned the connector, but I'll keep it in mind! Hahaha! So the location of the connector IN the body is what I need to find. I guess I'll see what I can tear apart and find and I'll get back with info/pics soon!
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It's actually pretty easy to access. Just remove the fabric strap from the back panel on the interior of the door (little cover pops off) and then yank the whole panel off. A few clips might break, FYI. Then take off the larger black access panel and you are in. the wiring will be right below the window and connects in the corner of the hatch on the driver's side before it squeezes up the side of the rear hatch and through the rubber tube and into the headliner. There's a second connector up there behind the headliner but highly doubt that would be the issue.
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08-25-2016, 07:03 AM
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#12
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Join Date: Jun 2013
Location: Nebraska
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Quote:
Originally Posted by gamefreakgc
It's actually pretty easy to access. Just remove the fabric strap from the back panel on the interior of the door (little cover pops off) and then yank the whole panel off. A few clips might break, FYI. Then take off the larger black access panel and you are in. the wiring will be right below the window and connects in the corner of the hatch on the driver's side before it squeezes up the side of the rear hatch and through the rubber tube and into the headliner. There's a second connector up there behind the headliner but highly doubt that would be the issue.
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What I'm gathering from the other posts here is that the issue exists in the body itself and not in the liftgate. I've checked the connections in the liftgate and visually they all look intact. I know that there's some cracked insulation on a few wires in the harness between the liftgate and body. After that, I'm not sure what the connection looks like.
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Huerta
"Black Burro" 2000 4Runner SR5, e-locker, Tundra/906 lift, Tundra brakes, 348K
"Fez Johnson (FJ)" 1997 Land Cruiser 40th Anniversary, Antique Sage, triple locked, 195K SOLD
"4-Lo Silver" 2010 4Runner Trail, bone stock, 178K, Lovin' it
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08-25-2016, 11:45 AM
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#13
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Elite Member
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Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
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Real Name: Jerod
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Quote:
Originally Posted by jhuerta22
What I'm gathering from the other posts here is that the issue exists in the body itself and not in the liftgate. I've checked the connections in the liftgate and visually they all look intact. I know that there's some cracked insulation on a few wires in the harness between the liftgate and body. After that, I'm not sure what the connection looks like.
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Gotcha. The next connector that I know of is just behind the driver's side headliner just inside the vehicle from the rear hatch. To get to that one you need to remove the rear cargo dome light, top trim piece (pops out), the two 10 mm bolts you just uncovered, bottom trim piece (4 screws I think), then the driver's side cargo body panel. That should be enough for you to peek between the headliner and the frame to see it. If you have to remove the headliner to get to it... good luck not damaging the headliner or breaking clips
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08-25-2016, 01:23 PM
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#14
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Quote:
Originally Posted by gamefreakgc
good luck not damaging the headliner or breaking clips
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Hahaha, much appreciated. I've removed the panels a few times for a project, and a few have already broken. I guess I should have the epoxy ready!
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Huerta
"Black Burro" 2000 4Runner SR5, e-locker, Tundra/906 lift, Tundra brakes, 348K
"Fez Johnson (FJ)" 1997 Land Cruiser 40th Anniversary, Antique Sage, triple locked, 195K SOLD
"4-Lo Silver" 2010 4Runner Trail, bone stock, 178K, Lovin' it
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09-04-2016, 12:43 AM
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#15
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Problem solved. So, even having the panel off three or four times in the past two years, I NEVER noticed a ground that wasn't connected. The PO wired in a trailer harness and never reattached the ground. It must have been making contact until after my fender bender. Hahaha! I had a feeling! Well, I connected it, and everything worked! Then, we disconnected it, and all the similar problems started again. Looks like I found my solution. Thanks for the help and suggestions!
- Huerta
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Huerta
"Black Burro" 2000 4Runner SR5, e-locker, Tundra/906 lift, Tundra brakes, 348K
"Fez Johnson (FJ)" 1997 Land Cruiser 40th Anniversary, Antique Sage, triple locked, 195K SOLD
"4-Lo Silver" 2010 4Runner Trail, bone stock, 178K, Lovin' it
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