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CAT3126 cranks but won't start (in Freightliner FL80)

3K views 0 replies 1 participant last post by  lbtst4 
#1 ·
Hi,
We have a 1999 Freightliner FL80 chassis with a CAT3126 engine (it is an RV). It was driving beautifully, was parked for 4 hours and now won't start. Fuse #4, which appears to be brake lights and DTR lights blew twice during this but now is fine. We thought that possibly a wire was effected and have been tracing wires so far to no avail. We have been trying to find the ECM fuse, which we read, is often near the battery box but can not locate that fuse anywhere. There are no codes coming up. The HEUI pump has already been replaced, we checked for air in the lines. Any advise would be helpful. We are not mechanics (but do have one who is trying to help) so please advide as if you were talking to 12 year olds so that we can understand what to do! Thank you.
 
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