07-07-2022, 11:48 AM
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#16
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unfortunately, that is what i'm thinking as well. slamming the door, causing a momentary vibration throughout the vehicle, could have an origin anywhere. and most wires are buried. i would start the search close to the drivers door. btw, are there any wires running under the drivers carpet?
Last edited by rwh963; 07-07-2022 at 10:23 PM.
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07-07-2022, 12:27 PM
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#17
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So far no one has mentioned checking your battery/charging system.
If it is on the low side it can wreak intermittent havoc with the ECMs in a vehicle.
Your battery voltage should be at least 12.6V engine off and at least 13.8V when engine running and alternator charging. If it measures OK with engine off turn on the headlights for a min or 2 and see if it stays at 12.6V. If it starts going down fast your batt could be going bad.
I've had all kinds of problems due to weak batteries or flakey alts on different vehicles thru the years.
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07-10-2022, 10:54 AM
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#18
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Quote:
Originally Posted by fourwd1
So far no one has mentioned checking your battery/charging system.
If it is on the low side it can wreak intermittent havoc with the ECMs in a vehicle.
Your battery voltage should be at least 12.6V engine off and at least 13.8V when engine running and alternator charging. If it measures OK with engine off turn on the headlights for a min or 2 and see if it stays at 12.6V. If it starts going down fast your batt could be going bad.
I've had all kinds of problems due to weak batteries or flakey alts on different vehicles thru the years.
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so, just checked battery with meter:
engine off: 12.17
engine on: 14.04
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07-10-2022, 11:22 PM
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#19
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12.17V is a bit low, what happens when you turn headlights on, engine off and running?
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'84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, 2" drive train lift, BudBuilt x-member/skid, 30 spl Longs
'83 Toy P/U - Buick 231 V6, Holley 4 bbl, Weiand intake, Downey headers, TH350 w/700R4 low gearset,
'89 4Runner SR5 - stock
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07-13-2022, 07:30 AM
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#20
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Quote:
Originally Posted by fourwd1
12.17V is a bit low, what happens when you turn headlights on, engine off and running?
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i'll test later.
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07-15-2022, 09:34 AM
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#21
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so, still experiencing chronic but unpredictable drop offs. happens locally and at highway speeds. it coincidentally occurred after that initial cruise test. just yesterday, i was on the highway and decided to test cruise. could not get it to engage. i tried repeatedly, but did not function. cruise light showed up on the dash.
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07-15-2022, 09:35 AM
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#22
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and more fun: i've been pulling the #3 fuse under the hood often because it turns off the blazing stop lights. i forgot to put it back in this morning. started up the car, couldn't shift. the shift lock had activated. i pushed it down, and could shift. noticed for the first time the ABS light has turned on. i went under the hood and replaced the fuse. the ABS light stayed on all day. all other symptoms the same.
wondering if starting the car without that fuse in tripped the shift lock and ABS warning light.
as you can see, the #3 fuse is also swimming with many of the issues i'm encountering. thoughts?
Last edited by rwh963; 07-15-2022 at 09:42 AM.
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07-15-2022, 09:43 AM
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#23
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strange to have so many of my issues possibly running through that one fuse:
weird, just look at that.
1) stop lights
2) shift control lock
3) ABS
4) TRAC
5) VSC
6) fuel injection (hesitations?)
7)trailerl lights (recent failure)
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07-15-2022, 09:43 AM
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#24
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i'm hoping all of these issues can be tied to one origin point, and a relatively inexpensive one at that. also hoping it is not the ABS module, as that is not inexpensive.
that said, i have never noticed any odd wetness in the fuse box area. what i have experienced over the past few years is an unexplained damp carpet only on the front drivers side. never seen any wetness under the dash, or water dripping anywhere. i've attributed it to some sort of drainage misdirection. i don't believe there is any wiring or electronics under that area.
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07-15-2022, 12:25 PM
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#25
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Seems worth a try to buy a new fuse and see what happens. It may also be a short in the wires nearby if you can trace the wires
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07-15-2022, 04:00 PM
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#26
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i have swapped out that 10A fuse, no difference. purchased a relay that corresponds to the brake lights, no difference. getting the feeling its something "below" the surface.
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