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Dead Electrical system with no cranking

Tiny
JOHNSHOLL
  • MEMBER
  • 1994 ACURA VIGOR
  • 64,000 MILES
Battery terminal connections were accidently reversed while jump starting. Now the only electrical that works is e-flashers and horn. Ignition switch is worn but did work okay. Battery voltage does show at 100 amp relay in under hood box.
Tuesday, August 21st, 2012 AT 7:00 PM

4 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Check the main fuses and the ground connection at the transmission for the battery cables.
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Tuesday, August 21st, 2012 AT 7:03 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You mentioned battery voltage at 100 A main fuse, are you getting battery voltage at both ends of the fuse?
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Tuesday, August 21st, 2012 AT 7:12 PM
Tiny
JOHNSHOLL
  • MEMBER
  • 2 POSTS
No obvious relay/ fuses for crank/run circuit bad -cable grounds good. The accidental reverse polarity jump start caused the crank and run circuit to go completely dead. Could it have damaged an already worn ignition switch? (Burned contacts etc.)
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Tuesday, August 21st, 2012 AT 8:03 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Did you test the 100 A main fuse? You must have battery voltage at both ends. Reversing polarity would normally casue the main 100 A fuse to blow first.

Even if the ignition switch is bad, you would still have the tailligts, are they working?
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Tuesday, August 21st, 2012 AT 9:41 PM

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