doc47 Posted January 14, 2012 Share Posted January 14, 2012 This is bizarre! When I depress the brake (automatic tranny) the headlights dim momentarily and the radio goes off for a few seconds. WTF?????? Quote Link to comment Share on other sites More sharing options...
3Pin Posted January 14, 2012 Share Posted January 14, 2012 Check the battery. Mind did that when the battery was close to the end of its life. Quote Link to comment Share on other sites More sharing options...
davebugs Posted January 14, 2012 Share Posted January 14, 2012 Check the battery. Mind did that when the battery was close to the end of its life. And check ATF, sometimes TC issues will cause this. I'd have alternator AND battery checked for free at a chain place. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted January 14, 2012 Share Posted January 14, 2012 And maybe see what voltage you have when this is happening. I had something like this happen on a different car, and the radio going out was just a symptom. It had gotten down to about 10 volts (from idling for a long time with all accessories on and foot on brake). The radio started cutting out and I looked at the voltmeter and spotted the problem. Quote Link to comment Share on other sites More sharing options...
doc47 Posted January 15, 2012 Author Share Posted January 15, 2012 Good suggestions. I'll check it out. Thanks all. Quote Link to comment Share on other sites More sharing options...
Nubaru Posted January 15, 2012 Share Posted January 15, 2012 +1 to alt and battery, another thing to look at is the fusible link, (big wire connector in the underhood fuse box) i'v had some issues there, it may be getting weak. While the test is going on and the tester is on the car it will show the voltage on the system, i would have the parts guy look at it and see if there is a serious voltage drain while you hit the brakes, if it's any more than 1v you likely have a grounded wire on the way to the brake lights. just my 2c good luck with it. Quote Link to comment Share on other sites More sharing options...
doc47 Posted January 15, 2012 Author Share Posted January 15, 2012 And check ATF, sometimes TC issues will cause this. I'd have alternator AND battery checked for free at a chain place. TC issues??? What is TC? Quote Link to comment Share on other sites More sharing options...
CoupedUpSubie Posted January 15, 2012 Share Posted January 15, 2012 Torque Converter Quote Link to comment Share on other sites More sharing options...
doc47 Posted January 16, 2012 Author Share Posted January 16, 2012 Thanks. I hope it's not that. However, why would the TC affect the brakes and lights? What's the connection? Quote Link to comment Share on other sites More sharing options...
davebugs Posted January 16, 2012 Share Posted January 16, 2012 Sometimes usually if ATF is overfilled it's lke the TC doesn't disengage soon enough. Causing stalling like symptoms. Other than hearing the car's RPM's go way low often noticed by idiot lights, difficulting turning sharp, etc. Quote Link to comment Share on other sites More sharing options...
Cougar Posted January 17, 2012 Share Posted January 17, 2012 Another possible issue could be a loose power connection or chassis ground connection that is moving when the brakes are pressed. If you haven't cleaned the battery connections yet and especially the wire that runs from the battery to the power distribution under the hood I suggest you do that. If that doesn't fix the trouble then try tapping on various main connectors to see if can trace the trouble to one of them. Quote Link to comment Share on other sites More sharing options...
nipper Posted January 17, 2012 Share Posted January 17, 2012 I love how tranny issue is linked together with this electrical issue. Test your alt output. With EVERYTHING on and engine at 1800 rpm you should be getting over 13.5 volts. Clean your batter terminals If your still not sure remove the brake light bulbs and see if it still happens. If not your charging system is border line or battery. Quote Link to comment Share on other sites More sharing options...
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