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Old 05-04-2017, 08:05 PM
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Default 97 Tahoe - Wipers Have a Mind of Their Own

My wipers have gone nuts. They will switch speeds, stop mid wipe, continue wiping after being turned off, etc.

These are the intermittent wipers om the turn signal stalk like a billion other GM cars. The motor works, I think the switch works. I'm guessing this has a pulse board, maybe not.
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Old 05-04-2017, 08:13 PM
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First guess when electronic controls go insane: bad electrolytic caps somewhere in the circuitry. Second guess: an IC went bad.

Pulse module: [Only registered and activated users can see links. Click Here To Register...]
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Old 05-04-2017, 08:55 PM
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Rock auto....roughly 1/2 the Oreilly prices....
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Old 05-05-2017, 03:43 AM
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Rock auto....roughly 1/2 the Oreilly prices....
O'Reilly...just down the street so you can get things fixed without waiting for shipping.

Plus, they're HQed in my town. Spend money with them and it helps my local economy!
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Old 05-05-2017, 09:42 AM
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Originally Posted by mrvette View Post
Rock auto....roughly 1/2 the Oreilly prices....
O'Reilly...just down the street so you can get things fixed without waiting for shipping.

Plus, they're HQed in my town. Spend money with them and it helps my local economy!
I have an O'reilly just a mile away, don't even have to get on the commercial highway, burb streets all the way....so I tend to live there, all the clerks know my name......but for any jobs that don't require immediate attention....it's Rock auto.....
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Old 05-05-2017, 05:16 PM
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First guess when electronic controls go insane: bad electrolytic caps somewhere in the circuitry. Second guess: an IC went bad.

Pulse module: [Only registered and activated users can see links. Click Here To Register...]
Was looking at pictures of the pulse board and I don't see any electrolytic capacitors on the board.

What I did find is that the connector solder joints seem to be a very common failure. Guess I'll try re-soldering or replace the board and see if that cures it.
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Old 05-06-2017, 09:41 AM
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Originally Posted by Sam Cogley View Post
First guess when electronic controls go insane: bad electrolytic caps somewhere in the circuitry. Second guess: an IC went bad.

Pulse module: [Only registered and activated users can see links. Click Here To Register...]
Was looking at pictures of the pulse board and I don't see any electrolytic capacitors on the board.

What I did find is that the connector solder joints seem to be a very common failure. Guess I'll try re-soldering or replace the board and see if that cures it.
STILL an issue?? on them solder joints?? after all these years.....I guess the road vibration does it's job.....over the decades I guess I have soldered dozens of them ....
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Old 05-10-2017, 10:43 AM
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I re-soldered the connector and it works like new now.

Solder joints really didn't look bad. Also, re-greased the gear while I was in there.
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Old 05-10-2017, 02:25 PM
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I re-soldered the connector and it works like new now.

Solder joints really didn't look bad. Also, re-greased the gear while I was in there.
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