My 93 Geo Storm (1.6L, auto) started lighting up the 'battery' and 'brake' lights on the dashboard. When that happens - 1) the dashboard lights get brighter, 2) the a/c compressor seems to cut off, 3) the fan motor (a/c,heat) shuts off. We just replaced the alternator and the 1st 10 miles were fine, then the a/c compressor stopped, and both lights came on again (battery & brake). It seems something is making the alternator overcharge. Now, both the radiator fans (2) and the heater, a/c fan do not work. No blown fuses. very odd. I am trying to find a wiring diagram to check the relays, etc. Any ideas?
Engine was running too hot, thermostat s/b 180, it was 195, antifreeze solution had too much water, this caused the radiator thermal switch to trip. I think the alternator was either bad, or the excessive heat made it draw too much. Two separate problems.
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You have a brake light switch attached to your brake pedal,may be loose or bad.Read what it says,if bad light will stay on,easy to replace,just disconnect electrical connector,then unscrew nut,then remove,the end piece clicks on and off,I have a 85 Nissan 720 truck,have replaced mine before years ago. Duralast Stoplight Switch JA413 Read 1 Reviews on Duralast JA413
Yes, it could be. Or you can check your battery. And try adding brake fluid to your master cylinder. That sometimes will cause the brake light to come on. Or check your emergency brake. Hope this helps, James Booth.
Check looseness or corrosion on the leads and wiring at the battery terminals. Check for looseness or corrosion on the alternator connectors. With vehicle started and reved to 2000RPM, use a voltmeter to measure voltage and that measurement should be between 13.5-14.8. If you're unable to achieve this voltage have your alternator checked at autozone or advance auto, its free. Hopefully this helps
power loss. any good car elect. tech find this pronto. just takes a volt meter to find the voltage drop point.
top fails: 1: corroded fuse box on right front finder (under fuse box) 2: did you say it kills motor too. cant figure above.
what about heater fan, it uses tons of current. as does HL followed by tails.
20amps, 15amps and 5amps respectively
you have resistance some where. and load , kills the voltage .
for me. i'd: check battery voltage , when it dims out. then of ok 12.5v is ok key on,not started. then check voltages at a right fender , fuse panel all points there, 12.5vdc , same as battery v. if OK then check voltage at the fuse above right knee with load full, hl, fan, brakes, just key on.