need electrical help after swamping the 4runner

[Steve240]

Got the 4runner stuck with water over hood. Was in it for 10 mins before winched out. water was up to the pedals in the interior. Since getting it home and cleaning it up the only connector I found in rough shape is the one under the driver side door sill. I've since cut it out and respliced all the wires.

Everything is currently working except interior lights, radio, clock. and power locks. I've removed every connector in both driver and passenger foot wells and cleaned them out with contact cleaner. Haven't really found any connector that looked bad. I've checked every fuse inside the engine bay and the one in the dash.

From electrical drawings I've found the interior lights clock and radio get power from the dome fume in the engine bay. That fuse is okay and I read 12 volts across it. I am not sure from the electrical drawings where the power locks get power from.

Been at this for two weeks without finding anything that looks out of sorts. Any advice would be great. thanks

 

[IBallEngineer]

Got the 4runner stuck with water over hood. Was in it for 10 mins before winched out. water was up to the pedals in the interior. Since getting it home and cleaning it up the only connector I found in rough shape is the one under the driver side door sill. I've since cut it out and respliced all the wires.

Everything is currently working except interior lights, radio, clock. and power locks. I've removed every connector in both driver and passenger foot wells and cleaned them out with contact cleaner. Haven't really found any connector that looked bad. I've checked every fuse inside the engine bay and the one in the dash.

From electrical drawings I've found the interior lights clock and radio get power from the dome fume in the engine bay. That fuse is okay and I read 12 volts across it. I am not sure from the electrical drawings where the power locks get power from.

Been at this for two weeks without finding anything that looks out of sorts. Any advice would be great. thanks

There are multiple power sources for the power door lock system, the primary one being the 30A Power Fuse in the inside fuse block, left side of dash.

 

[Steve240]

Thanks, already replaced that fuse with no change.

 

[TheDurk]

I need your year. I may post diagrams and it would be silly to post the wrong ones.

Did the water reach the Body ECU behind the fuse box by driver's knee?

 

[Steve240]

Its a 97 4wd 3.4 auto.

I dont believe the water reached the body ECU as it was only up to the pedals. I have had all those connectors out at the back of the interior fuse box but I dont recall seeing the body ECU, what does it look like?

 

[Steve240]

I just looked up the Body ECU, I have already removed it and checked it. No water had entered it.

 

[TheDurk]

I just looked up the Body ECU, I have already removed it and checked it. No water had entered it.

Actually, the '97 did not have a Body ECU--those functions were managed by the Integration Relay (see how fast you get messed up if you don't give the year?).

Anyway, if the windows work and the door locks do not, it's clearly not the 30A Power fuse. And, despite the unquestioned brilliance of [MENTION=102597]IBallEngineer[/MENTION], on a '97 the only power source involved in the door locks is that 30A POWER fuse. (seee EWD attached) So honestly, as painful as it is, the likely culprit is that Integration Relay, which is not a cheap part. If you can find incoming 12V+ at Pin 11 of the Integration Relay, that's pretty much it. You can do all the checks listed under service hints--maybe one of the switches that command the relay is shorted and that keeps it from working at all. That's the only other thing I can think of.

The interior lights and radio are controlled by the same relay. As to the clock, does the cigarette lighter work?

 

[IBallEngineer]

Actually, the '97 did not have a Body ECU--those functions were managed by the Integration Relay (see how fast you get messed up if you don't give the year?).

Anyway, if the windows work and the door locks do not, it's clearly not the 30A Power fuse. And, despite the unquestioned brilliance of [MENTION=102597]IBallEngineer[/MENTION], on a '97 the only power source involved in the door locks is that 30A POWER fuse. (seee EWD attached) So honestly, as painful as it is, the likely culprit is that Integration Relay, which is not a cheap part. If you can find incoming 12V+ at Pin 11 of the Integration Relay, that's pretty much it. You can do all the checks listed under service hints--maybe one of the switches that command the relay is shorted and that keeps it from working at all. That's the only other thing I can think of.

The interior lights and radio are controlled by the same relay. As to the clock, does the cigarette lighter work?

Brilliant!

I don't have paper on the 97, it's old school man! And I should since I have a 96 Tacoma, but that thing never has a problem unless I create it!

 

[Steve240]

Yeah I learned pretty quickly I didn't have a body ecu when I took apart the fuse box and had a table full of electrical strips... wasn't fun fitting that all back together.

The windows work so power to the 30amp fuse is okay. Where is the integrated relay, is that the black box that plugs into the interior fuse box?

And which relay controls the interior lights and radio? I have checked all the relays to make sure the connections look clean but they may not be working I haven't got to the point of changing them all out yet.

I see that radio, interior lights and clock get power from the 10amp dome fuse. That fuse has power so a relay might be the right idea. I did not check the cig lighter yet

The locks and interior lights should work without the ignition turned to acc, is there any relay or circuit that specifically controls those items or could it be an issue within the ignition circuit?

thanks again for the help and the pdf link

 

[TheDurk]

Yeah I learned pretty quickly I didn't have a body ecu when I took apart the fuse box and had a table full of electrical strips... wasn't fun fitting that all back together.

The windows work so power to the 30amp fuse is okay. Where is the integrated relay, is that the black box that plugs into the interior fuse box? Yes.

And which relay controls the interior lights and radio? I have checked all the relays to make sure the connections look clean but they may not be working I haven't got to the point of changing them all out yet.

The Integration relay, as I said.

I see that radio, interior lights and clock get power from the 10amp dome fuse. That fuse has power so a relay might be the right idea. I did not check the cig lighter yet

The locks and interior lights should work without the ignition turned to acc, is there any relay or circuit that specifically controls those items or could it be an issue within the ignition circuit?

Again, the Integration Relay.

thanks again for the help and the pdf link

My answers in BOLD.

The clock runs continuously off the DOME fuse. But the display only lights up if the key is on. These clocks tend to fail by refusing to light up. Odds are the clock issue is unrelated to the rest. Checking the cig lighter would shed light on that. The other possibility is you fell afoul of the evil dummy plug, which is a place the clock harness will plug into perfectly but no connection is made. Make sure the clock harness plugs in right behind the clock. This is more likely given that you have had stuff apart.

 

[Steve240]

Okay thanks. I did open that relay and did not see anything noticeably wrong on the circuit board. There is a good size black round component in there which is the only thing i think could be bad. I'll try to find a used one to swap in too see if that corrects the issue. Thanks

 

[TheDurk]

Okay thanks. I did open that relay and did not see anything noticeably wrong on the circuit board. There is a good size black round component in there which is the only thing i think could be bad. I'll try to find a used one to swap in too see if that corrects the issue. Thanks

That's what I would do.