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Old 08-17-2007, 02:46 PM   #1 (permalink)
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Windshield Wiper Relay

Anyone know where the windshield wiper relay is in the car? I can't seem to find it in the TSRM or the Haynes manual I have. I see that it should have one, but I don't know where it is. I have an '87 Supra Turbo.
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1987 Supra running 3" Turbo-back exhaust on a 7M-GTE @ 11.7PSI.
Greddy Turbo timer, wideband O2, AEM Air-Fuel Gauge, and Greddy Boost Controller installed.
Project '87 MR2 almost running.
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Old 08-17-2007, 11:42 PM   #2 (permalink)
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Passenger kick panel.

http://www.cygnusx1.net/Supra/Librar...px?S=Main&P=15
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Old 08-19-2007, 10:27 PM   #3 (permalink)
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I appreciate it, I found it earlier this weekend. As I thought, it looks like it's my wiper switch that went out, the switch isn't sending power, the fuses are fine, the module looks fine, and the motor isn't getting any power.

That pretty much narrows it down, since everything works except everything that is attached to that switch.
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1987 Supra running 3" Turbo-back exhaust on a 7M-GTE @ 11.7PSI.
Greddy Turbo timer, wideband O2, AEM Air-Fuel Gauge, and Greddy Boost Controller installed.
Project '87 MR2 almost running.
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Old 08-27-2007, 09:58 PM   #4 (permalink)
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Yeah, so I'm pretty much stuck at this point. I replaced the entire switch assembly and I'm still getting nothing. I already took out the "relay" for the wipers and it's FINE. There's nothing visibly wrong with it.

I guess at this point, that's my only option? The fuse is fine, I already tried to replace it, and it didn't fix it, the motor is NOT getting power, and the only relay I can find is more like a control module, anyone have any advice?
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1987 Supra running 3" Turbo-back exhaust on a 7M-GTE @ 11.7PSI.
Greddy Turbo timer, wideband O2, AEM Air-Fuel Gauge, and Greddy Boost Controller installed.
Project '87 MR2 almost running.
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Old 08-27-2007, 10:08 PM   #5 (permalink)
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Grab a multimeter and start testing for the voltage drop.
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Old 08-28-2007, 04:34 PM   #6 (permalink)
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With a little more effort today, I've determined that the fuse IS getting power, so the fuse area is fine, but the control module (Relay?) is NOT getting power. Also, the switch is not sending power, and I don't think it's receiving power either; however, I haven't had a chance to test for that.

At this point, should I just take it to a shop? I really don't have the desire to deal with trying to follow wires that go in and out of insulated hoses and come out a mess. The only assumption I can make at this point, is that there is a short in one of the wires, anyone have any advice?
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1987 Supra running 3" Turbo-back exhaust on a 7M-GTE @ 11.7PSI.
Greddy Turbo timer, wideband O2, AEM Air-Fuel Gauge, and Greddy Boost Controller installed.
Project '87 MR2 almost running.
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Old 08-28-2007, 04:56 PM   #7 (permalink)
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Well, if powers getting past the fuse but not to the switch a short or a bad harness connector may be to blame, but typically in either of those circumstances you'd see *some* voltage...
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Old 08-28-2007, 05:30 PM   #8 (permalink)
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I'm using a test light, not a voltmeter, so that could account for some of that.
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1987 Supra running 3" Turbo-back exhaust on a 7M-GTE @ 11.7PSI.
Greddy Turbo timer, wideband O2, AEM Air-Fuel Gauge, and Greddy Boost Controller installed.
Project '87 MR2 almost running.
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Old 08-28-2007, 08:31 PM   #9 (permalink)
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I was able to fix it. There was an aftermarket fuse housing dealy (no idea what it is in all honesty) that was causing two fuses (completely unrelated to the wipers) to be facing the front of the veh, therefore invisible to me. I had a friend look at it, and we were able to replace the blown fuse and restore working wipers! Yeah!!

Thanks for all your help guys! It's always a pleasure.
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1987 Supra running 3" Turbo-back exhaust on a 7M-GTE @ 11.7PSI.
Greddy Turbo timer, wideband O2, AEM Air-Fuel Gauge, and Greddy Boost Controller installed.
Project '87 MR2 almost running.
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Old 08-29-2007, 12:49 AM   #10 (permalink)
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Ah the joys of working on used cars.

Glad you got it sorted out.
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