88mj34tsl Posted February 27, 2012 Author Share Posted February 27, 2012 Ok. I have run a wire Straight from battery to alt and a wire from battery to the yellow wire its not showing its charging at all. Link to comment Share on other sites More sharing options...
Jeep Driver Posted February 27, 2012 Share Posted February 27, 2012 I've had alts test good and be bad. I don't trust the testing. Link to comment Share on other sites More sharing options...
JeffN Posted February 27, 2012 Share Posted February 27, 2012 Does the gauge show voltage? or is the idiot light on with key on not running? If not you found your problem, take a test light and touch to the non yellow wire and see if it lights up. If it does have someone start the truck and see if the test light goes out, if it doesn't then you have a wiring issue to the dash. Link to comment Share on other sites More sharing options...
88mj34tsl Posted February 27, 2012 Author Share Posted February 27, 2012 I reckon I'm a idiot.... what is the idiot light? Could i by pass the other wire Link to comment Share on other sites More sharing options...
88mj34tsl Posted February 27, 2012 Author Share Posted February 27, 2012 And the gauge is showing about 10 volts and goes down as the battery gets weak Link to comment Share on other sites More sharing options...
Jeep Driver Posted February 27, 2012 Share Posted February 27, 2012 And the gauge is showing about 10 volts and goes down as the battery gets weak The alt is bad.........period!.........go get another one. Link to comment Share on other sites More sharing options...
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