1998 Honda Civic LIGHTS AND SPEEDOMETER

146,000 MILES • 4 CYL • 2WD • MANUAL
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KJ88
  • MEMBER
  • 1 POST
speedometer jumps around. only once in a while the lights will stop flicking but the speedometer never stops jumping. how do i stop this?
Jan 25, 2009 at 3:37 PM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Hi KJ88,

The speedometer jumping around could be due to a faulty speed sensor located on the trans axle differential housing below the thermostat housing. It could also be related to the lights flickering and I would suggest rectifying the the lights flickering first.

Possible causes are:
1. Bad body ground. check all grounds at front fender inner side behind headlights.
2. Alternator. Check the charging rate, ensure crankshaft pulley harmonic balancer is not faulty ( if equipped) before testing charging rate.
Apr 7, 2021 at 5:56 AM
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