1992 Other Plymouth Models all dashboard ck lights, ck engi

WHITERABBIT67

MEMBER
1992 PLYMOUTH
4 CYL
FWD
AUTOMATIC
149,000 MILES

My 92 plymouth laser well all the ck lights come on alteranator wont charge, all the sensor lights are on. Just had all sensors replaced new computer, and shorted wire replaced, in wiring harness, was driving and lights started to fade engine ran rough radio stations stared going berserk, then lights faded to nothing, then car died. Will not crank, but if she sits she will restart but it all happens again

1 Reply

MERLIN2021

MECHANIC
17,250 POSTS

Get an analog voltmeter remove the negative battery cable, attach the Black lead to the battery post, Red lead to cable end, then pull fuses one at a time, make sure there are no accessories or lights in the on position, Key off! Close the door after each fuse and check meter, when you pull the fuse for the bad curcuit, the meter will drop to 1 volt or so. Check all fuses, even under the hood. If meter does not drop, remove the battery connection from the alternator, if it drops now, the diodes are bad in the alternator. Put the fuse back in were it goes as you go so you don't forget which fuse goes were!
Try to charge your battery fully befroe doing this, your sensors need 9 volts minimum or the PCM wont work.