Rear Window 1988 4Runner no longer functioning
#1
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Rear Window 1988 4Runner no longer functioning
Having some issues with my rear power window on my 88 4Runner. Just recently it stopped working. I seemed to have tried everything and still can't figure out what the problem is . Wondering if anyone here might have any ideas.
I have removed the hardtop and replaced it with a soft top. The other day
I accidentally hit the rear wiper switch and then turned it off, can't be 100%
sure though if that was the last time I noticed it worked. Would this cause it to stop working?
Things I have tried
1. Tested the motor with 12V power supply goes up and down
2. Tested each switch in the circuit all function perfectly. Only one I didn't test was the cover-top switch
3. Switched out the Relay with another one. (Is there anyway to actually test the relays?)
4. Applying 12V to pins 1 and 3 on the relay connector powers the window motor
5. Doing the test on the relay connector as per the Service Manual produces these results:
8-G: 12V with Ign S/W On - PASS
6-G: Always 12V - PASS
10-G: Always Continuity - PASS
2-G:
a) Continuity with Back Window Limit S/W On - PASS
b) 12V with IGN S/W ON and Back windows limit S/W OFF - FAILS
c) 0V with IGN S/W ON and Back window limit S/W ON - PASS
4-G: 12V with IGN S/W ON and Rear power window switch at FREE position - FAILS
5-G: 12V with IGN S/W ON and Rear power window switch at FREE position - FAILS
11-G: 12V with Backdoor control S/W at FREE position - FAILS
12-G: 12V with Backdoor control S/W at FREE position - FAILS
7-G: 12V with IGN S/W ON - FAIL
7-10: Continuity in the relay with IGN S/W OFF - FAILS
9-G: 12V with rear wiper operated (Hard top removed can't test as no rear wiper)
13-G: Continuity with rear wiper retraction detection S/W ON - (Hard top removed can't test as no rear wiper)
Wiggling the relay while it's connected and the car is running I can feel/hear it clicking
All help is greatly appreciated.
Thanks
I have removed the hardtop and replaced it with a soft top. The other day
I accidentally hit the rear wiper switch and then turned it off, can't be 100%
sure though if that was the last time I noticed it worked. Would this cause it to stop working?
Things I have tried
1. Tested the motor with 12V power supply goes up and down
2. Tested each switch in the circuit all function perfectly. Only one I didn't test was the cover-top switch
3. Switched out the Relay with another one. (Is there anyway to actually test the relays?)
4. Applying 12V to pins 1 and 3 on the relay connector powers the window motor
5. Doing the test on the relay connector as per the Service Manual produces these results:
8-G: 12V with Ign S/W On - PASS
6-G: Always 12V - PASS
10-G: Always Continuity - PASS
2-G:
a) Continuity with Back Window Limit S/W On - PASS
b) 12V with IGN S/W ON and Back windows limit S/W OFF - FAILS
c) 0V with IGN S/W ON and Back window limit S/W ON - PASS
4-G: 12V with IGN S/W ON and Rear power window switch at FREE position - FAILS
5-G: 12V with IGN S/W ON and Rear power window switch at FREE position - FAILS
11-G: 12V with Backdoor control S/W at FREE position - FAILS
12-G: 12V with Backdoor control S/W at FREE position - FAILS
7-G: 12V with IGN S/W ON - FAIL
7-10: Continuity in the relay with IGN S/W OFF - FAILS
9-G: 12V with rear wiper operated (Hard top removed can't test as no rear wiper)
13-G: Continuity with rear wiper retraction detection S/W ON - (Hard top removed can't test as no rear wiper)
Wiggling the relay while it's connected and the car is running I can feel/hear it clicking
All help is greatly appreciated.
Thanks
Last edited by Toyota4Runner; 07-21-2010 at 05:51 PM.
#2
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I have to admit, the technicals you've supplied are beyond my knowledge. But, one thing I'd ask you to clarify is if the window was still operational once you swapped out for the soft top. IOW, has the window been working all this time with the soft top on and now it's not?
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I had a similar problem a few weeks ago with my 86 in that the rear window was stuck in the up. I finally found the problem. There is a switch on the driver side that one of the the roof bolts goes into. I cant remember which but if you take off the side cover (that the speaker is in) you will see it. It had tripped and needed resetting. I reset it and it has worked fine since. Also might check that your rear wiper is back in place. If it is not resting in the notch, it cuts the circuit to the rear window.Hope this gets you going.
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I have to admit, the technicals you've supplied are beyond my knowledge. But, one thing I'd ask you to clarify is if the window was still operational once you swapped out for the soft top. IOW, has the window been working all this time with the soft top on and now it's not?
Thanks for the repsonse
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I had a similar problem a few weeks ago with my 86 in that the rear window was stuck in the up. I finally found the problem. There is a switch on the driver side that one of the the roof bolts goes into. I cant remember which but if you take off the side cover (that the speaker is in) you will see it. It had tripped and needed resetting. I reset it and it has worked fine since. Also might check that your rear wiper is back in place. If it is not resting in the notch, it cuts the circuit to the rear window.Hope this gets you going.
Thanks again
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Thanks
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#8
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Is the rear window lock button engaged in your center console? If is it "locked" I believe it makes both the console switch and the rear key switch in-operable. I have had my soft top on for a couple of months and I occasionally bump the rear window up and down so I know it will work with the top off...BUT I had to bypass that switch in the driver's side panel that detects when the hard top is on.
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So I was able to resolve the problem. It ended up being the cover top switch. Removed it and just placed a jumper in the connector. working fine now. Thanks to everyone for their help.
#13
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Right on! I didn't know about the window lock. I have the bare bones 85 4runner and I don't think I have it! (I don't even have an odometer or tachometer!!!)
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