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Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 9463
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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My N14 select plus had engine warning lite. But would start

Customer Question

My N14 select plus had engine warning lite. But would start but no pulling power. Found 20 amp Fuze blown. Replaced. Drove truck did great. This morning Turn ignion on check lites come on and go off. Then turn key further to engage started nothing. Checked Fuze blown again, replace Fuze gain same thing. Did I blow my ecm?
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 1 year ago.
Hi I'm Wayne
I will help you with this
Thank You for requesting me
If the fuse is blowing right away ,
check harness wires to it for rub marks,
grounding out, if all wiring is OK,
unplug the harness from the ECM,turn ign to on, see if that fuse blows again
if no,
Then yes your ECM is shorting inside
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