mechanical or electrical gauges

[HISSIN50]

on a gauge(s) affected like that, i personally would check the grounds first. not sure what others will say.

good luck.

 

[Michael Yount]

Grounds like JT said; I'd also haul that puppy into AutoZone or Sears and have them roll their magic cart out and load test the alternator and battery to see if they're doing what they should. Is it possible the regulator is acting up in the alternator and you're exceeding 14.4V?

Check it out Joe - we'd hate to see that one burn up or something. When gauges jump around in conjunction with completely unrelated other electrical devices, I wouldn't worry so much about the gauge; I'd worry about the whole electrical system.