Bouncing tech, cleaning grounds

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Author Message   Arthur S. Au (Arthur) New Member Username: Arthur Post Number: 28 Registered: 10-2002 Posted on Tuesday, December 23, 2003 - 08:18 am:    95 Disco. Rpm's reading at least what it should be but often bounces higher and back to normal. Plugged and unplugged the wire a few times behind the alternator in case of loose contact. Other connections at the alternator good. Still bounces. Battery voltage with truck off is 12.8. I want to check the voltage with the truck on. Do I simply measure at the battery terminals also? Should I expect to get a bouncing reading similar to the rpm bobing? No abnormal noise from alternator. I found in the archive a list of grounds to clean. Is the first step to remove the negative lead at the battery? Also, for the 95 Disco, is there a risk of triggering the SRS light by disconnecting the battery? Thank you.   Blake Monchilovich (Azblake) Member Username: Azblake Post Number: 94 Registered: 02-2003 Posted on Tuesday, December 23, 2003 - 11:40 am:    Yes SRS may trip. I had the same problem which was a failing and then seized alternator. Shop for a spare or rebuild kit.   Robert Sublett (Rubisco98) Senior Member Username: Rubisco98 Post Number: 1094 Registered: 04-2002 Posted on Tuesday, December 23, 2003 - 06:38 pm:    Time for an alternator, go Mean Green   Arthur S. Au (Arthur) New Member Username: Arthur Post Number: 30 Registered: 10-2002 Posted on Tuesday, December 30, 2003 - 08:39 am:    Would like to post the solution to my problem. It was only caused by loose tech connector at the alternator. Tightened up the connector and speedo fine again.