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Registered:
February 2004
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Re: ST162 headlight washer motor diagram needed
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Thu, 21 October 2004 07:51
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Thanks for offering help mate. It's a factory Toyota kit, but the pump and the relay w/ timer come from (I think) a Toyota Supra Mk3. The headlight washers are operated pressing the normal button for the windshield washers TWICE. It used to work like that, when pressed twice, the headlight AND windscreen washers are both triggered. I could not operate the headlight washers separately. So I'm assuming the function of pressing the normal button twice was already in that button. Well, under the dash, we found the two wires that operate the windshield wipers, and two new wires had been soldered to them. The normal, stock wires continue to the stock fuse box and probably set a relay somewhere. The new wires are led to the engine bay, and run to the relay w/ timer from the Supra. It has a 5 wire connector attached to it. Two of the wires are the ones coming from under the dash. The other three are a constant plus (+12V), 1 ground, 1 wire running to the actual pump (has to be switched to ground by the relay).
The pump has two wires connected: 1 constant plus (+12V) and the wiring coming from the relay. The two wires from under the dash have to set the relay. The weird thing is, you'd think that if you press the washer button twice, you'd see something else happen than when pressed once. We used a multimeter, but couldn't find a difference. One wire always has +12V on it, and drops to 0 if the button is pressed (doesn't matter if you press it once or twice), the other is a constant +12V...
Am I even right about the pump being ground-triggered?
Well. Any insight would be greatly appreciated 
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