Cummins E brake or "Jacobs brake"
#1
Cummins E brake or "Jacobs brake"
My dad has a 98 12v with a cummins e brake made by jacobs witch the part numbers are ( jacobs 022453) ( cummins 3933128) and it is not working, seems to be electrical. It has 2 inline fuses one for the main power just off the fuse box and one off the switch and whet the truck is off and you hit the switch it activates the relay but doesn't actuate the brake. but when you fire the truck up and hit the switch both 20a fuses blow. if anyone has any ideas it would be very helpful also if you have the same system and you have installation instructions or operating instructions I would love to see them.
this is a exhaust brake like a BD
this is a exhaust brake like a BD
Last edited by 1993firstgennewbie; 04-29-2013 at 04:48 PM.
#3
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