99 F250 dies when wipers turned on - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 05-07-2006, 08:07 PM   #1 (permalink)
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99 F250 dies when wipers turned on

Engine dies sometimes when wipers are turned on. Also sometimes when radio is turned on? when driving at highway speeds, turning wipers on sometimes causes truck to chug until wipers were turned off.
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Old 05-07-2006, 09:53 PM   #2 (permalink)
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Re: 99 F250 dies when wipers turned on

It is very difficult to diagnois like this, but I'll guess you have a charging problem...
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Old 05-16-2006, 10:53 PM   #3 (permalink)
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Re: 99 F250 dies when wipers turned on

Charging system fine. Ford Dealer has no clue. small time shop
suggested the multifunction switch under steering column? (stated
fords are notorious for them going bad, and has even heard of starter
engaging when radio is turned on).
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Old 05-17-2006, 02:39 AM   #4 (permalink)
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Re: 99 F250 dies when wipers turned on

Have you owned this truck long? Almost sounds like it has been submerged before, This will cause all KINDS Of electrical problems... WOW, talk about GREMLINS!!! [img]/ubbthreads/images/graemlins/rolleyes.gif[/img]
I dont have a clue as to where to start looking. But if you got ahold of a good wire diagram and look to find some common area from radio/w/s wipers to the engine operating system, replace that common item? I have no idea what your small time shop is talking about with a multifuntion switch on the steering column? Cant be too common a failure, I have never read about it on here in almost 5 years as a member. AND TONS of time on here! LOL
I think I would check the fuse block? Look on the back for corrosion, Also look at all wireing looms for any melted wires, Maybe one or two got pretty hot and melted together? Your starter engages when you turn the radio on? [img]/ubbthreads/images/graemlins/eek.gif[/img] Good luck and let US know if you find something ok?
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Old 05-17-2006, 08:03 AM   #5 (permalink)
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Re: 99 F250 dies when wipers turned on

At first I thought it might possibly be something related to the recall for the wiper motors. Wiper motors catching on fire, etc. A faulty motor could cause some kinds of electrical gremlins by dragging down the system voltage on some circuits. Then I saw you had more electrical issues.

Check all the ground connections. Problems with accessories coulld be related to the engine controls. One common item the circuits share is the ground connections.

Also check the connections from the batteries, (make sure they are clean) and the alternator to the fuse panels. Condition of fuse panels, such as accumulated dirt in the outside unit could be a factor.
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Old 05-18-2006, 06:38 PM   #6 (permalink)
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Re: 99 F250 dies when wipers turned on

Sounds like it might be the "fubar" part. [img]/ubbthreads/images/graemlins/wink.gif[/img]
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Old 05-22-2006, 03:37 PM   #7 (permalink)
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Re: 99 F250 dies when wipers turned on

I would try to isolate the problem first. First, prove that it's not related to the wipers and/or the radio. With the motor running, connect a 12-volt bulb across the battery terminals. Did that make the motor die? Try a bigger bulb. Did the motor die? If either bulb made it die, then it is probably related to how much current is being drawn from the battery. Now, try attaching a battery charger to the battery with the motor running. Do the same test with the bulb. Did the symptoms change? If having the battery charger prevented the motor from dying, then the alternator/battery probably isn't providing enough current to keep the motor running. By having the extra 10 amps or so that the battery charger added, the bulb didn't bring the motor to a point of losing shutting down. Try the wiper/radio test with the battery charger connected. Another test to do is to fully charge your battery for a couple of days and see if your symptoms still occur. If the symptoms are independent of the state of the battery and alternator, then it might be wiring somewhere.

Not all car shops do scientific analysis when it comes to diagnosing these problems. Replacing a part to see if the problem goes away is what they typically do. However, some intermittent problems merely become less intermittent that sometimes, it appears that the problem went away.
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Old 05-22-2006, 08:20 PM   #8 (permalink)
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Re: 99 F250 dies when wipers turned on

I have seen the same problem on a 96 PSD. There was some electrical interference from the wiper motor that interfered with the engine electrical. I replaced the wiper motor and haven't had a problem since.

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Old 05-22-2006, 08:55 PM   #9 (permalink)
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Re: 99 F250 dies when wipers turned on

Seems like I have seen this posted before. Do you have any electronic power adders? You may want to try searching on this in archives.

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Old 05-22-2006, 11:12 PM   #10 (permalink)
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Re: 99 F250 dies when wipers turned on

Any chance you have a windshield leak and it is getting on your GEM module? (located under the radio or thereabouts I believe but could be wrong, sorry). A few folks with cracked windshield report leaks on this module also.
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Old 05-23-2006, 03:26 AM   #11 (permalink)
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Re: 99 F250 dies when wipers turned on

It is a gem module issue. I had a similar problem with my '99. for example, if I pressed the brakes my windshield wipers turned on. The worst was the power door locks would spontaneously activate, locking me out of the vehicle. There were other symptoms as well. The Ford dealership had no clue. It took three service calls in two days to resolve the issue.
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Old 05-24-2006, 10:33 AM   #12 (permalink)
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Re: 99 F250 dies when wipers turned on

The last one I had do this It was the ground wire that is just to the right, above the Master cyl on the fire wall. it was a bad Ground. Good luck this is the ground that grounds the PCM.
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Old 09-15-2006, 11:43 AM   #13 (permalink)
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Re: 99 F250 dies when wipers turned on

Thanks for the suggestions, although they have not lead to the repair. I have changed the multifunction switch & the very expensive GEM. I will not order the wiper motor & check out the ground wire. I also had the front end go out again. (once at 35K & now at 55K). If you ever have to do the same. order the Dyna free spin kit from offroadunlimited. (half the price as the dealer, & stronger).
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Old 08-12-2014, 06:53 PM   #14 (permalink)
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wipers shutting down engine

I am have having this same problem with my 1999 7.3 F250 super duty. Using the wipers will shut down the engine. It happens rain or shine. Replaced the cps with a ford cps. Still happening. Replace the wiper motor, still happening. Re wired the wiper motor, still happening. I had a mechanic spend two days going over all the wiring ect. He has no idea. If I am giving the truck fuel it just hiccups and the check engine light comes on. If I am at a stop engine shuts off. Please help with any advice!!!! I have tried everything and have reached a point I may have to sell.
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Old 08-12-2014, 08:41 PM   #15 (permalink)
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If the check engine light comes on, then there will be a code stored that should point you in the right direction. Getting is scanned is the FIRST thing you should do.

Even though you've changed the CPS, there might be a spot in the harness that's chafed and shorting out intermittently.

Again, the codes will point you toward the solution.

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