Question about 1994 Pontiac Trans Sport

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Front wipers only work on high

I have a 1994 Pontiac Transport

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  • jsterling574 Mar 12, 2009

    What about the wiper pulse module? could it be that and where is it located?



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U are going to have to replace the wiper switch.

Posted on Mar 12, 2009

  • yadayada
    yadayada Mar 12, 2009

    that is a circuit board mounted on the wiper motor, u can buy it as a kit, yes that may also be the problem

    CARDONE SELECT Part # 81158PB {[Wiper Motor Pulse Board] New Price $16.15, source of part,



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In the under hood fuse box , should have diagram inside the lid . Front wiper's or rear ? Front fuse # 36 - 25 amp. Plus Two relay's PCB hi and Wiper PCB relay . Wouldn't think this being fuse problem . Wiper switch , motor etc... The wiper's are control by a computer . BCM - body control module .

The windshield wiper/washer system consists of front and rear wipers. The front and rear wipers are operative when the vehicle is in accessory or run. The front wipers have 4 different modes: Mist, Intermittent, Low, and High. When the front wipers are in the intermittent mode, there are 5 delay modes to chose from, commanded by the windshield wiper washer switch through the body control module (BCM). The rear wipers has an only one mode.

If the fuse is bad , could have a short to ground or wiper motor pulling to much current (amps) . Fuse's don't just blow for no reason ! Could also have DTC'S - diagnostic trouble codes stored in the BCM .
DTC B3715
DTC B3873
DTC B3875
DTC B3922

DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.
The BCM controls the windshield wiper motor through two output controls, controlling two different PCB relays which control the desired wiper speed, high or low.
DTC B3922 00: Front Wiper Function Select Circuit

The PCB relay's are non- servicable , replace fuse box . Soldered in Your best bet mit be to take it to a qualified repair shop .

Feb 20, 2017 | Pontiac Cars & Trucks

1 Answer

Why does the front windshield wipers on my pontiac transport only work on the highest setting?

hi Christina, the most likely cause is that the contacts in the wiper switch itself are worn out.

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1 Answer

Front wipers will quit, then restart once unit is cool. Is there a wiper relay? and where is it? 1993 pontiac transport

Typically a relay would not cause this problem. My assumption would be that it is the actual motor of the wipers. However, the relays should be located right where the fusebox or may be on the passenger side under the hood. When you pull off the cover you should be able to see a relay labeled wipers. You can try replacing the relay to see if it gets fixed. However, I believe it is the actual motor.

Good luck

May 26, 2011 | 1993 Pontiac Trans Sport

2 Answers

1994 pontiac transport windshield wipers periodically stall in the upright position

Inthe wiper motor mechanism there is a mettle tab that wears with the constant back & forth motion of the wipers. It needs to be bent back up to allow the wipers to stop in the down position. Remove wiper arms then the plastic shroud,then the armeture parts, then the mechanism to reveal the bent tab.

Sep 14, 2009 | 1994 Pontiac Trans Sport

1 Answer

Engine change

Drop cradle with engine, tranny, steering rack, front struts and all attached to it.

May 10, 2009 | 1994 Pontiac Trans Sport

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