1994 Chevrolet C1500 Power Loss

1999 GMC C1500
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SHAKER
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  • 1 POST
Driving down highway speedometer will jump back to zero and the truck seems to lose power for a fraction of a second then the speedometer will jump back up to the correct speed. I connected a radar detector into the cigarette lighter and when the speedometer jumped back to zero the radar detector reset itself meaning the truck lost total power and cut right back on. So apparently the whole truck is losing power for a split second. It does not do this at idle or slow speeds only moving down the highway.
1994 Chevelot 1500 Pickup
176,000 miles
Apr 10, 2006 at 7:17 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
The ligter is an ignition off hot through a fuse. It sould like you should check you battery connections especially the grounds. Check the smaller red wire to a connector on the fore wall. They feed the truck. Check for loose or corroded connectors. Let me know
Apr 10, 2006 at 10:40 AM

Suggested Repair

Check the battery connections, especially the grounds, and the smaller red wire at the firewall connector that feeds the truck. Inspect for loose or corroded connectors.

Conversation Summary

A 1994 Chevrolet 1500 pickup briefly loses all power at highway speed, causing the speedometer to drop to zero and a radar detector plugged into the cigarette lighter to reset. It does not happen at idle or low speed. The expert said the lighter is ignition-switched power through a fuse and recommended checking battery connections, especially grounds, plus the smaller red wire and connector on the firewall for looseness or corrosion.

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