Battery light issues
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New User
Joined: Nov 2016
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Battery light issues
Anyone have the battery light turn on and off after you replace both batteries and the alternator? It will flash on and off for about 15 mins of the drive then turn off until the next time we drive it. Any ideas would be appreciated
Fleet Mechanic
Joined: Oct 2010
Posts: 1,997
Likes: 206
From: South Eastern Michigan
Maybe plug a battery monitor into the power point to see what the numbers are doing.
The 3 pin connection to the alt can have a bad connection until it warms up and this will cause the light to go on. Grounds are important as well.
I also had a huge issue with the rectifier in mine. Kept going bad. I put another brand alt on and have not had an issue since. Along with the new alt, I wired a power and ground directly to the battery. This helped a great deal.
The 3 pin connection to the alt can have a bad connection until it warms up and this will cause the light to go on. Grounds are important as well.
I also had a huge issue with the rectifier in mine. Kept going bad. I put another brand alt on and have not had an issue since. Along with the new alt, I wired a power and ground directly to the battery. This helped a great deal.
Lead Driver
Joined: Apr 2011
Posts: 8,259
Likes: 346
From: Northern California
Most likely culprit is the connector that plug into the back of the alternator.
the prongs get bent taking it off, either bend them back so they grip tight or spend a few buck and replace the connector with a new pig tail from any auto parts store.
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rudedawg
1987 - 1996 F150 & Larger F-Series Trucks
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Dec 7, 2009 06:14 PM
