My wipers only work on HI!?!

Joe50 · 07-30-2002, 12:58 PM

I'm having trouble figuring this one out...my wipers will only work on full blast...when I put it on low or on intermediate it acts as if the wipers are off. I've changed the wiper/turn signal switch already, and I don't know what else could be causing this. Please Help.

Thanks

Conman · 07-30-2002, 03:35 PM

well if it works on full blast I'd assume that the motor is good

other than that maybe the wiring is shot or the connectors are corroded?
have you done any testing around the switch with a volt meter?

cyberstang5.0 · 07-31-2002, 07:21 AM

I had a similar problem....

My wiper motor went bad. I just went to a junk yard and bought a "new" one.

Also, if that doesn't work, you might want to check your "multifunction switch". It's the switch that's in your sterring colum that operates every function for that lever. We had to replace that on my mom's T-brid... and it was expensice. Hope it's just the motor.

Joe50 · 07-31-2002, 07:24 AM

Yeah...I replace the multifunction switch already. I just can't imagine that the motor is bad. Has anyone ever heard of a bad wiper motor only working on high only?

Chevyguy · 08-01-2002, 10:42 AM

My wiper motor did that on it's way out. The motor was getting tired, and would only work at high, that has the most current going to the motor.

Leave the motor in the normal on position, hit the wiper motor with a hammer etc, if it starts up, it's going bad. The wiper motor design was changed in 92 or so. The motors AutoZone carries are the updated ones, you need a harness update from Ford to run one. Lucky I was like a week left on the warranty from NAPA for my motor and got it replaced free. I would imagine any Mustang that gets used regularly in the rain etc will have a wiper motor failure, I've had two go on my 90, and my beat box 88 has a bad one too.

Agent_4573 · 08-01-2002, 12:41 PM

I'm not sure on this but is the wiper relay switch contained in the multifunction switch you already replaced? if not it could just be a bad relay.

07-30-2002, 12:58 PM	#1
Joe50 Registered Member Join Date: Jan 2000 Location: Newport News, VA Posts: 78	My wipers only work on HI!?! I'm having trouble figuring this one out...my wipers will only work on full blast...when I put it on low or on intermediate it acts as if the wipers are off. I've changed the wiper/turn signal switch already, and I don't know what else could be causing this. Please Help. Thanks __________________ "Drive it like you stole it!" '94 Vibrant Red GT

07-30-2002, 03:35 PM	#2
Conman Registered Member Join Date: Apr 2002 Location: Kingston, Ontario Posts: 351	well if it works on full blast I'd assume that the motor is good other than that maybe the wiring is shot or the connectors are corroded? have you done any testing around the switch with a volt meter? __________________ '88 lx, Black on Black, check it out here Spent all my money on school, what a dumb mistake I'm old enough to know better, but still too young to care.

07-31-2002, 07:24 AM	#4
Joe50 Registered Member Join Date: Jan 2000 Location: Newport News, VA Posts: 78	Yeah...I replace the multifunction switch already. I just can't imagine that the motor is bad. Has anyone ever heard of a bad wiper motor only working on high only? __________________ "Drive it like you stole it!" '94 Vibrant Red GT

08-01-2002, 10:42 AM	#5
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	My wiper motor did that on it's way out. The motor was getting tired, and would only work at high, that has the most current going to the motor. Leave the motor in the normal on position, hit the wiper motor with a hammer etc, if it starts up, it's going bad. The wiper motor design was changed in 92 or so. The motors AutoZone carries are the updated ones, you need a harness update from Ford to run one. Lucky I was like a week left on the warranty from NAPA for my motor and got it replaced free. I would imagine any Mustang that gets used regularly in the rain etc will have a wiper motor failure, I've had two go on my 90, and my beat box 88 has a bad one too. __________________ 2001 Crown Vic Maurader Airbox/MAF, DR chip Edel IAS shocks Single exhaust :wtf: 93 P-71 Vic interceptor Backup car now 90 5.0 LX Notch SOLD 74 Chevy Laguna type S-3 454 under construction Currently apart undergoing bodywork.

08-01-2002, 12:41 PM	#6
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	I'm not sure on this but is the wiper relay switch contained in the multifunction switch you already replaced? if not it could just be a bad relay. __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

07-31-2002, 07:21 AM	#3
cyberstang5.0 347ci of HORSE POWER!!! Join Date: Jul 2001 Location: Houston, TX Posts: 1,416	I had a similar problem.... My wiper motor went bad. I just went to a junk yard and bought a "new" one. Also, if that doesn't work, you might want to check your "multifunction switch". It's the switch that's in your sterring colum that operates every function for that lever. We had to replace that on my mom's T-brid... and it was expensice. Hope it's just the motor.

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