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 Rear window Key Switch??
#511106
10/09/04 02:29 AM
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Joined: Sep 2004
Posts: 227
OP
Wheeler
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So the rear window on my 84 Runner will go up using the key in the lock, but won't go down. No problem when using the inside switch up front. Any ideas?
Thanks!
84 4RUNNER,22R,HEDMAN,WEBER 32/36,Davis Unified Ignition,33" BFG
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Re: Rear window Key Switch??
[Re: SALMONHEAD]
#511107
10/09/04 02:31 AM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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Rear Window troubleshooting page... Ohm out the switch and see if it is making contact then see if the switch signal is making it to the relay then see if the relay is working.
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Re: Rear window Key Switch??
[Re: 4Crawler]
#511108
10/09/04 04:15 AM
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Joined: Sep 2004
Posts: 227
OP
Wheeler
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Thanks 4crawler! I'm starting with the wiring loom in the drivers side rear storage since that's easiest & the wire colors for up & down were identified in MALLRunner story (blue/blk completes the up, blue/wht completed down). I was able to find the wires so if I test while my wife turns the key in the lock I should get 12v? Sorry but I'm just learning the electrical stuff.
84 4RUNNER,22R,HEDMAN,WEBER 32/36,Davis Unified Ignition,33" BFG
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Re: Rear window Key Switch??
[Re: SALMONHEAD]
#511109
10/09/04 04:52 AM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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You'll need to study the wiring diagram on my page. You'll see that the swiches all work off of ground, that is they ground various connections to the relay module. You'll see the voltage go to 0 when the switch closes. What you can do is compare what the switches that work do to what the ones that don't and use that to help diagnose the problem. Or use an ohm (resistance) meter or test light and check out the continuity between the switch and the relay.
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Re: Rear window Key Switch??
[Re: 4Crawler]
#511110
10/09/04 05:27 AM
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Joined: Sep 2004
Posts: 227
OP
Wheeler
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Ok when you turn the key to the left the voltage on the blue/blk wire drops to zero & the window goes up. When you turn the key to the right the voltage on the blue/wht wire does not change & the window does nothing. So does this mean the problem is between the plug in the storage area where I'm testing and the switch at the key? Do I need to pull the back door apart now to get to the switch area around the key? Thanks Again!
84 4RUNNER,22R,HEDMAN,WEBER 32/36,Davis Unified Ignition,33" BFG
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Re: Rear window Key Switch??
[Re: SALMONHEAD]
#511111
10/09/04 05:33 AM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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Well that basically says the signal from the switch is not reaching the relay, so its somewhere in the wiring, connector(s), or the switch itself. Probably next step is to remove the door panel and see if the switch itself is working (i.e. measure for 0 resistance between the contacts). If that works, then its the connector or wiring, otherwise its the switch.
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Re: Rear window Key Switch??
[Re: SALMONHEAD]
#511112
10/09/04 09:30 AM
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Joined: Apr 2002
Posts: 5,688
Trail Leader
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Good place to look for the problem is in the tailgate itself. These switches seem to boogered right at the backside of the switch...could be a corroded or broken wire. Second place is where the harness comes into the tailgate. Wire chaffing over the years takes its toll. I got my junk working with a few long nights tracing the entire frickin circuit. Some burnt fingers from doing the soldering repairs...but results were a fully functioning 4Runner. ~Darin <img src="/forums/images/graemlins/baby.gif" alt="" />
88' 4x4 *22R-EB Gen II* 87' $Runner *22R-EB Gen I* 85' Sillyca 22R-Esq  "I LIVE IN MY OWN WORLD...THEY KNOW ME WELL THERE"
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Re: Rear window Key Switch??- FIXED!!
[Re: Esquire812]
#511113
10/09/04 09:08 PM
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Joined: Sep 2004
Posts: 227
OP
Wheeler
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Thanks for all the help on this. The bad wire was between the switch connection and the plug in the storage area. 4crawler I really appreciate the electrical lesson and link to the write up's. It just didn't make sense before!
84 4RUNNER,22R,HEDMAN,WEBER 32/36,Davis Unified Ignition,33" BFG
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Re: Rear window Key Switch??- FIXED!!
[Re: SALMONHEAD]
#511114
10/09/04 11:30 PM
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Joined: Jan 2000
Posts: 12,153
Web Wheeler
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No problem, glad you found the problem. I've updated my page with a bit more troubleshooting info. based upon this thread: Rear Window Troubleshooting
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Re: Rear window Key Switch??
[Re: Esquire812]
#511115
10/09/04 11:46 PM
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Joined: Feb 2000
Posts: 183
Wheeler
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Second place is where the harness comes into the tailgate. Wire chaffing over the years takes its toll. This is where I need to look more in depth. My rear key switch doesn't work in either direction but it checked out good. The two main wires running between the switch plug and relay pack have no continuity though. I've been dreading pulling the interior apart to replace these wires for years, maybe I ought to get off my butt and check the more easily replaced section first <img src="/forums/images/graemlins/smile.gif" alt="" />
Last edited by toy283; 10/09/04 11:48 PM.
Dave
'84 X-Cab supercharged 283 V8, SM420, dual cases, etc.
'85 4Runner
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