Friday, August 24, 2012

1998 Chevrolet S10 2.2, Brake Lights Not Working



This vehicle came into the shop with a customer concern of no working brake lights.  The vehicle had been taken to another repair shop a few weeks ago and the customer was told it would cost several hundred dollars to repair the problem.

I confirmed that all three brake lights were inoperative.  This model has the customary two brake lights on the rear and a brake light called the Center High Mount Stop Light, or CHMSL for short.  All three brake lights were inoperative. (After doing some further investigation after I repaired the truck, I found the CHMSL bulbs were blown.)

This led me to a quick look at a wiring diagram, which led me to take a look at the Underhood Fuse Panel.


When I removed the cover something caught my eye, even before I could check any fuses.  I noticed something was missing.  Where I am pointing you will notice four empty cavities.  This is where the CHMSL Relay is suppose to be . . .  but it's not!  The relay would look like the relay above my finger (the grey rectangle).


I happened to have one in the shop.  I plugged it in.  Below I am pointing to the now present CHMSL Relay.


Sure enough, with a quick test of the brake pedal . . . presto!  the brake lights were working.

This is a quick post just to remind us not to overlook the small things.  Before pulling out the PowerProbe or Test light or whatever else, be sure to give a visual inspection of the components.  As this job reminds us, first make sure they are where they are suppose to be; and second, make sure they are in good/working condition.

Sometimes the easy, simple solution is the right one.

10 comments:

  1. The front blinkers work
    But in a very fast pace
    I dont have nothing working
    On the back side of the truck

    ReplyDelete
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  2. More than likely your rear bulb needs to be replaced.

    ReplyDelete
  3. I have replaced all the bulbs in the drivers side rear tail light and still the light will not work I checked inside cab for #5 fuse and it is ok Can you advise please ?

    ReplyDelete
  4. Thanks man for the such information. I really like this car due to impressive design and performance. I have the Chevrolet S10 Owner Manual that will help me in its repairing and servicing.

    ReplyDelete
  5. solo un favor me podrias mandar una foto de la parte trasera sin tapas para ver la relacion del cableado gracias de antemano

    ReplyDelete
  6. I have a 2001 s10. V6 two wheel drive. Brake light above rear window works some of the bulbs are blown but they are working. No rear brake lights. What should I check?

    ReplyDelete
  7. That's it! I've got the same problem and solved it with your super help.

    ReplyDelete
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