f350 diesel stalls w/ wipers on

[bfd1262]

I have a 99 f350 dually that will stall when the wipers are on intermittent. I have tryed a new wiper motor and multifunction switch with no luck. Grounds all look good, alternator is good because the plow on it works fine. Does anyone have any ideas or maybe a wire diagram for this truck? Thanks

[ZMANN]

I have read about this before

Keep searching I Know your not alone

[Greenman01]

Can you make it stall by using any other electrical functions? My first thought is a broken ground strap.

[bfd1262]

Only stalls when the wipers on are intermittent. All other electrical stuff works. I have checked the ground on the engine and it looks good.

[ZMANN]

it appears to be a possible GEM issue General Electrical Module ( other names used also )

or a CPS or a wire chafe at the steering column

read their description Ford GEM Modules « Auto Parts Cheaper Blog

And do a google for Motor dies with wipers you don't even need to use the word 4 to get hits LOL

[Bill Kay]

I had the same exact problem with my truck. Did all the things you did and it ended up being the CPS.

[NoRalPh]

There can be interference from the wiper motor that has been related to the CPS. Thing is though, I thought the cure for it was the new (Grey) CPS and I assume that's what you have already?

Anyway here's the link -> Stumbles when it rains??

[The Stig]

Thats weird...is it bad that i feel my wipers jerk my brake pedal (very minor jerk)? Could that be a sign that my CPS is failing?

[bfd1262]

I bought a CPS from a local Shop a week ago. Today bought one from the dealer. The problem was fixed with the dealer CPS!!! Some things you can buy from your local auto parts store and some you can't. UNBELIEVABLE Thanks for all the replies.

[INFRNL]

I was going to say CPS; it was probably a BWD that you had installed. There is a fix for your issue. The BWD cps is better than ford. Ford CPS=Junk
Keep an eye out for misses and drop in fuel mileage because it is very possible that you will experience this with your ford CPS. Best of luck.
I run BWD with no issues, another good cps is the Delphi