Fuse values for coilpack, EDIS and MegaJolt

pavel5 · Post by **pavel5** » Wed Mar 02, 2011 1:03 am

I installed fused power supplies for the coilpack, EDIS unit and the MJLJ but do not know what size fuses to use. At the moment I have inline fuses from the battery of 30 amps and 5 amps for the Ford components respectively and only 1 amp for the MJLJ. Am I way off base? Everything works well so far.

Thanks from the happy neophyte...

Pavel

pavel5 · Post by **pavel5** » Wed Mar 02, 2011 4:48 am

OK, I found a thread on this topic back on Jul 08, 2009 9:58 pm. As I understand it, you measure the current flow with the system running and then use a fuse of a higher value. Sounds simple.

It would be interesting to see what fuses Ford used for these circuits. Does anyone know?

Post by **brentp** » Wed Mar 02, 2011 3:53 pm

You can certainly measure current, and you will see that current consumption goes up as a function of RPM.

At max RPM you typically won't current consumption beyond 10A on a single coil pack (such as on the EDIS-4 configuration), so a 15A fuse is a good choice for this application.

pavel5 · Post by **pavel5** » Wed Mar 02, 2011 4:58 pm

Thank you Brent:

Ours is an EDIS-6 coilpack but I'll just flip in a 15 amp fuse as you recommend and see what happens.

Cheers

Pavel