Pre- heater fuse
I had this issue a coupe of years ago.
Big fuse 250 amps is on the pre-heater. which blew.
The tech said that when the ignition is first turned on, several bootups are taking place. (def, ecm etc.)
You must wait till these happen. If you start too soon you are overloading the system and the fuse will blow.
The starter draws a lot of amps as well as the pre-heater and the 250 fuse will let go.
The access is through the after bath floor panel on the top of the engine.
My remedy to start sequence is as follows:
1. Turn on ignition
2. Wait till you hear the systems boot up (on mine, six clicks) and wait for "wait light" to go out.
3. Turn off ignition and repeat the sequence. (this allows the preheater to perform twice ensuring good heat into the intake manifold.
4. Then start engine.
The whole process only takes about 15 seconds and will ensure that you do not overload that fuse or the system. Patience, patience, patience.
Best wishes to all.
Gregg & Sandy, Penngrove, California
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