ECM for a 60 series Detroit 515

Ck. fuse in fuse box, one in BATT. box also.

 

My fuse isn't in the battery box. My mechanic thought it was. It's up close to the firewall under the hood. So if you don't see one in the box check there also. Mine did almost same thing.

 

Then find the pins that are supposed to have batt power, key power, and ground. A DD shop should be able to tell you the pin numbers.

 

Not PIN (personal identification number), pin in the ecm plug. IE what wire going into the ecm plug should have batt power, key power, and ground. Remember, the ecm needs a perfect ground as well as both powers.

 

Check brown wire coming off battery's.small14 gage wire.you should have a large fuse box junction right above batteries.that wire powers up the ecm

 

Check that wire with test light.the wire is out in the open and can crack and turn green.this is common problem on these