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View Full Version : RPM's die when windshield wipers are on??

roel03
09-25-2009, 11:07 PM
If I put on my wipers in the morning for a second, or when its raining the revs drop from about 1000rpm's to 300. Then once I turn the wipers on, they raise back to normal. It does not do this with any other switch from the cabin. Suggestions?
Bigsyke
09-25-2009, 11:12 PM
Ground, check the fsm
ixfxi
09-26-2009, 01:04 AM
weak battery/alternator, could also be a loose connection for pos or neg terminal
Tenchuu
09-26-2009, 01:47 AM
normal. that is why no one has their windshield wipers on at the track.


or what they said above.
roel03
09-26-2009, 01:18 PM
The battery and alternator is new. I will recheck my grounds.

Does the wiper have a specific ground its connected to?
Addicted2Kouki
09-26-2009, 03:14 PM
the grounds are on the harness that go from the fusebox to the steering column.

you will see them if you get things outta the way.
they branch off and just bolt up to the radiator support.
roel03
10-01-2009, 07:56 PM
Got any pics of the spot. I tried but couldnt find anything.
Tantwoforty
10-02-2009, 06:17 AM
Got any pics of the spot. I tried but couldnt find anything.
follow wires, trace from the wiper motor, to the relays, to the ground....
s15specR
10-02-2009, 02:50 PM
Are you running a standalone, you electrical load compensation may be off, just a a thought ????
roel03
10-04-2009, 05:12 PM
No im not running a standalone. Where is the wiper motor so I can trace it?

I redid all the ground on the upper half of the radiator support that I can find and still nothing. Tried wipers while each ground was off and they still worked so I doubt Ive found the right ground.
roel03
10-05-2009, 03:46 PM
I couldnt find a ground from the wiper motor. It just has an immediate plug and them branches off into the harness.
Bigsyke
10-05-2009, 03:49 PM
I believe there are grounds on both sides of the support. 1x by the evap and the other by the battery.

Your FSM will tell you exactly where. Its not hard.

Redo all your grounds and clean teh contact surfaces. Smear some marine grease on the contact points
roel03
10-05-2009, 04:19 PM
From the FSM I found ground E28 and E42, but couldnt find a diagram of where those two grounds are?
roel03
10-08-2009, 04:16 PM
Anyone know where those two grounds are?