Question about 1993 Volvo 940

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25amp fuse blows when ignition is tured on volvo940 gl 1994

25amp fuse blows when ignition is tured on this is for the front wipers ,horn and screenwash

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Disconnect (unplug) all the units that are supplied by the 25A fuse.
Switch on ignition and check that fuse has not blown- if it blows under these conditions the short or overload to ground is:-
a) in the wiring to one of the units,
b) or there is some other unidentified faulty unit still connected.

Re-connect each unit one at a time, observing fuse status.
If one of the units has a short / fault, it will blow the fuse when it is connected back in circuit.

Posted on Jul 03, 2009

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On 2008 gmc arcadia my front wipers quit working at all. Any suggestions? Where is fuse for front wipers?


WPR/WSW fuse 25amp is located in the under hood fuse box . This a complex system ,controlled by the BCM . If you find that the fuse is good i suggest you take it to a qualified repair shop . This wiper / washer system has the capability to set DTC'S - diagnostic trouble codes !
DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
The Body Control Module (BCM) monitors the control circuit of the WIPER relay. The voltage level should be low while the WIPER relay is de-energized and near system voltage when the relay is energized. After the BCM receives a low, intermittent, or mist signal from the wiper/washer switch, it responds by applying battery voltage through the WIPER relay control circuit to the coil side of the relay, energizing the WIPER relay.
DTC B3873 00: Front Washer Relay Circuit
DTC B3875 00: Wiper High Speed Relay Circuit
DTC B3922 00: Front Wiper Function Select Circuit
I really don't think this is a fuse problem , but if it is a blown fuse they don't just blow for no reason . Low resistance high current flow ,short to ground .
The wiper / washer switch is a input to the BCM - body control module . Depending on switch position the BCM will energize a relay the WPR relay or the WPR HI relay .

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1 Answer

2007 dodge nitro so the fuses for my door locks and wiper pump keep blowing. Took the fuse box out checked all the wires. There is no exposed wires or wires crossing. Anything else it could be.


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I'm going to assume this is for the front wheel drive version.
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1 Answer

My wipers keepr blowing the 25amp fuse. I replaced


check the wire motor power circuit and see if you have a bad wire

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Electical


You may have some short circuits in your wiring, a bad horn relay or horn unit, and/or a bad wiper motor. Hard to tell without actually looking at it.
Try this:
Disconnect the horn, and try another fuse. Does it blow? If not, the horn is shorted, and needs replaced. If it blows, remove the horn relay & try another fuse. Same with the wiper motor, unplug it and try another fuse. If it does not blow, you need a wiper motor.

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