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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8413
Experience:  I am ASE Master Truck Certified.
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2005 Sterling Tractor with Cat C13 Engine Vin# *****

Customer Question

2005 Sterling Tractor with Cat C13 Engine Vin# ***** showing “no eng” on dash. Turns over but does Does not run. Will run on either. Do not have power at ECM connector for Pin 70. Can you help me trouble shoot possible causes. Check wire from Battery
and Fuse in Battery. All OK. Assume a issue with Switch or Relay.
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 1 year ago.
Thanks for asking your question. I will try and help you out.
Yes 70 is the key switch wire. You should also have unswitched power on pins 52 and 53.
You most likely have a blown ignition fuse, faulty ignition relay, or a ignition keyswitch problem.
Most often I find a fuse in either the fuse box blown or the battery box.
Please reply back if you need more help or have more questions. I am happy to assist.
Customer: replied 1 year ago.
Check all fuses in both panels and battery bock. Check the relays and ignition switch switch could not find issue. Ended up running a new circuit and jumper from spare in fuse panel that was linked to the ignition switch.
Expert:  Cat Man replied 1 year ago.
Thanks for the update. I'm glad you got it fixed. Good job.