by spencerforhire » Thu Mar 06, 2014 7:49 am
First off, I will point out that GM wiper motor switches are ground switched; the accessory power from the key goes directly to the motor and not to the switch. It's like this so the wipers will "park" when you turn off the switch. If you number the terminals on the motor from left to right in your pic, the 12v+ goes on #1. #2 and #4(#3 is blank) are low and high; I forget which is which but easy to test. To wire the aftermarket switch, all you have to do is put ground on terminal marked B(the aftermarket switch is originally meant for Battery switched) and a wire from L to low and one from H to high. If you're also wiring up the washers, the + terminal on the pump would be hooked to accessory power + and the W terminal on the switch will go to the pump's - terminal.
Also the wiper motor itself should be grounded to the body of the car; originally, one of the rubber isolated mounting bolts would have had a grounding strip on it.
The "fleet"-
72 Vega HB Drag Car -383/'Glide/9"(9.35@146.19)(5.94@117.28 1/8th)
77 Vega Estate wagon- project(someday)will have TPI305/T-5, S-10 spindles/axles
76 Vega GT- 400/4spd/9" retired from active duty(rusty)
06 Silverado 2WD ex.cab daily
03 Silverado 2WD ex.cab (retired)
06 Haulin' 20ft enclosed car transporter
06 GMC Canyon Shop truck
07 Colorado project( 5.3 4L60e swap)
99 Saturn SL1- wife's car
01 Saturn SC2- son's project
07 Saturn Ion Redline project
and 4 more Saturn "parts cars"
Note- the very act of listing all of these has made me realize I have some kind of problem.....
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