Question about 1996 Plymouth Grand Voyager
It started out with the wipers working when they wanted to now the heater blower only works on high. It seems things are slowly dying off. I asked the dealer if they could reflash the BCM they said no, due to it was not flashable. So I went to the bone yard and got a used one, I asked the dealer if that would work , they said it probably would not start since the VIN # is imprinted on the BCM. Alst said would not stsrt. SO I didn't go thru the hassel of replacing it. do you know if replacing the BCM with a used one will work ?
First of all, all that's wrong with your blower is the resistor, $13.99 at autozone, 10-20 minutes to change it. Very common on these vans. Got to (autozone.com) and enter info on your vehicle then search for part name, (blower resistor) and a picture will come up, click on picture & it will expand for a good look at what your looking for under your hood, passenger side, on firewall. It pulls out, but disconnect your negative on your battery for safety sake. Can youo give us more info, or symptoms on wipers?
Posted on Feb 18, 2009
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Posted on Jan 02, 2017
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Body control module (BCM)
Wiper PCB relay
Wiper high PCB relay
Windshield wiper motor
Windshield washer fluid pump
Windshield washer fluid level switch
WPR fuse 25 A
WSW fuse 10 A
Low Speed Operation
When the wiper switch is in the low speed position, ground is applied through the switch internal resistor and the wiper switch low signal circuit to the body control module (BCM). In response to this signal, the BCM energizes the WIPER PCB relay by applying battery voltage through the wiper relay control circuit to the coil side of the relay. This allows battery positive voltage from the WPR fuse to flow through the switch input side of the WIPER PCB relay and out to the switch input side of the WIPER HIGH PCB relay. Since the wiper high relay is de-energized and its switch contacts are normally closed to the low speed control circuit of the windshield wiper motor, the motor will operate at low speed.
High Speed Operation When the wiper switch is in the high speed position, ground is applied through the windshield wiper switch high signal circuit to the body control module (BCM) indicating the wiper high speed request. In response to this signal, the BCM then energizes the wiper PCB relay, as stated above, and the wiper high PCB relay by applying ground through the control circuit to the coil side of the relay. With the wiper high relay energized and its switch contacts closed to the high speed control circuit of the wiper motor, the motor will operate at high speed.
Wiper motor high speed operation and the wiper high speed PCB relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References.
DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3875 00: Wiper High Speed Relay Circuit
DTC B3922 00: Front Wiper Function Select Circuit
You could Have a switch problem , BCM problem ,PCB relay problem , the pcb relays are non serviceable an the whole under hood fuse box would need to be replaced . Malfunctioning motor bad ground some where etc.....
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