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Old 04-24-2005, 10:02 AM
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wiper motor or switch

I have a 92 Ranger with intermitant wipers but the only speed I can get is hi someone told me that the motor is bad but I think it is in the switch does anyone have any input on? thanks for any input.

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Old 04-24-2005, 04:39 PM
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Doc here,

Not Experienced with the ranger wiper system....If it's like GM, it has power in run at all times to one wire at the motor, and the other 3 wires are speed control grounds ( Ground is used for switching)

If you can Verify this as correct on the Ranger, (BE SURE BEFORE YOU TEST) then by grounding each one of the wires at the motor, with power at "hot in run," should give you different speeds on each terminal...

I suspect that system may have a speed controller board though..You need to score a copy of the truck wiring diagram to be sure...try the local library reference desk to get a copy of one, or If they don't have one, should be able to outsource one for you within a few days.

If it IS wired like the GM,AND also has no speed controller board, and you get 3 different speeds at the motor from grounding each terminal one at a time wipers on..., your switch is bad...

Get a Copy of the Diagram BEFORE you test..You might ground out a power source accidentally and damage the system, or motor..

You can get a full manual at the local Auto parts store for about $20 bucks..or go the library route and copy what you need there (they usually don't check out reference material from the library)

Let us know what you find!

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