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Oldsmobile Forum: Alero no horn cruise control and erratic turn signals
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Old October 21st, 2012
radioman radioman is offline
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Alero no horn cruise control and erratic turn signals

Hello Everyone!

After the well known and nationally recalled Alero turn signal fix failed to work I wanted to share with everyone what else causes the failure of Horn, Cruise Control and Turn Signals.

I had changed the Hazard switch as in the recall and also changed the turn signal switch in the steering colum both failed to correct the problem.

wanted to tell you that the recall on the 1999-2004 Oldsmobile Alero turn signal recall is only good for 10 years or 100,000 miles. Also after having no success with repairing the problem by changing the hazard switch I have found a critical problem that mimics this recall issue.

Oldsmobile Alero with the following conditions:
Turn Signals flash erratically when manual or automatic headlights are on.
No horn condition and when horn is depressed the cruise control light blinks while horn is depressed.
Cruise control operated erratically or has no operation.
All turn signal lights illuminate when left or right signal is made when headlights are on and flash at a rapid rate.

Under the hood on the drivers side next to the air cleaner box there is a small black box the size of a match pack that is supposed to be screwed into the inner fender. There is an issue with the bolt snapping off from age and this is a critical ground point for the circuit breaker that controls the above functions.
If your circuit breaker becomes ungrounded this will cause the above problems and also drive one crazy.
There is a unused hole just to the front of the original location and if you use a self tapping screw and re attach the breaker all conditions are fixed!!

I was about to try a Body Control Module which also controls this function after no success with changing the hazard switch and also the turn signal switch in the steering column.

I found this by accident when working under the hood on another issue and it solves all problems.
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