Originally Posted by acehatz
Hi. I have 2000 nat tradewinds with a cat diesel.
My question. Is when i start it the battery lights stays on for around 2 to 3 min then goes off and seems alternator takes over.
Is this normal??
The very first thing I'd do if I were you is, try not to pay too much attension to "idiot" lights. What I'd do is, take a reading of your starting batteries, right at the posts, with a volt-ohm meter, when the engine IS NOT RUNNING. Note the findings.
Then, with the meters probes still on the battery, have the wife or, anyone you choose, start the engine. Watch the meter immediately after startup to see when any voltage change, takes place and, just what kind of change it is. Then you have a time reference to compare to, RIGHT AT THE BATTERY(S).