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Related Medium and Heavy Trucks Questions
No power to the ECM. From the ECM where do 52,53 and 70
No power to the ECM. From the ECM where do 52,53 and 70 wires go to? … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
64 satisfied customers
I have a 2000 3126. We replaced the chassis batteries and
I have a 2000 3126. We replaced the chassis batteries and now there is no wait to start light. The engine cranks hard now with the new batteries but won't fire up. I started it the day before with no … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2006 caterpillar c12 international 8600. Truck shut off on
2006 caterpillar c12 international 8600. Truck shut off on customer? Crank no start? will not run on starting fluid, getting voltage to ecm, check engine light comes on with switch. 200 rpm cranking?… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
C15 reads no eng, wont fire,gives code 140. power at pins 70
c15 reads no eng, wont fire,gives code 140. power at pins 70 52 53 and i thunk 55, but also has power at pins 63 65 67 and 69 … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
64 satisfied customers
I have 2003 kenworth t300 with cat 3126 will not start was
Good morning I have 2003 kenworth t300 with cat 3126 will not start was running just died no voltage at heui pump tach inop no codes … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2000 GMC C6500 with a 3126 just did the brakes and
Good evening sir. I have a 2000 GMC C6500 with a 3126 just did the brakes and suspension then went to start it and it will not run. It turns over fine just won't fire. Any ideas? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 1999 gmc T7500 with a cat 3126. Started the other
I have a 1999 gmc T7500 with a cat 3126. Started the other day and ran for a second then died. I've discovwewd that there is no power to my shutoff on my high pressure oil pump as well no power to hea… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
CAT 3126 freightliner sport chassis. Just quit while
CAT 3126 freightliner sport chassis. Just quit while driving. Acts like its not getting fuel. We checked the fuel pump all was good. Mechanic said something made the ECM hot and shorted out and melted… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Have a 2001 379 Peterbilt VIN 1XP-5DB9X-8-1D528464 with a
have a 2001 379 Peterbilt VIN 1XP-5DB9X-8-1D528464 with a 3406e,,, we dropped in a crate motor and now we can't communicate with ECM.... I guess I need a pin test for ecm to make sure something didn't… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
C15 acert in 9900 int crank no start, Changed batteries,
Volt oilpr watertemp rpm and speedom not doing right after ign on… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
When drivers door is opened and closed it will shut off. Do
When drivers door is opened and closed it will shut off . Do you have any ideas of what the problem would be. It is a 387 Peterbilt 2005 has a c15 Cat motor.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2000 STERING WITH C12 NO START GOING DOWN ROAD JUST SHUT OFF
2000 STERING WITH C12 NO START GOING DOWN ROAD JUST SHUT OFF LOOKING FOR WIRING DIAGRAM TO CHECK POWER AND GROUND TO ECM… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Im working on a 2001 cat 3126. Died while driving cranks but
Im working on a 2001 cat 3126. Died while driving cranks but no start. No communication on pro link. engine serial #ckm19576… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2001,379 peterbilt going down road and the truck cut off lost
2001,379 peterbilt going down road and the truck cut off lost power to gauges ,have fuel,truck will spin over, fuse to ecm in battery box is good ,could it be ignition, relay?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 3126 started this morning thengustdied won't start
I have a 3126 started this morning thengustdied won't start back checked filter I noticed the oil pressure was going to 60 psi just by Turing over dosenttry to hit a lick will start on either… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I need a wiring diagram of the pin input and out puts on a
I need a wiring diagram of the pin input and out puts on a 3126 Cat its in a Freightliner 1FVACXAK93HK20610. SERIAL#CKM54644. WONT START WILL NOT COMMUNICATE! I really want to check power and grounds … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2009 peterbilt model 378, with a c-13 LEE18461, I
I have a 2009 peterbilt model 378, with a c-13 LEE18461, I have power on pins 52, 53, and 70, and ground on 65 and 67. I ordered a new ECM, installed the reman, and I continue to get a j1939 code on t… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2000 GMC topkick with a 3126 cat engine. Shut off while running,
2000 GMC topkick with a 3126 cat engine. Shut off while running, will not restart. Checked voltage to ecm. 12 volts to pins 52 an 53 .I have 1200 psi. pressure in high pressure manifold while cranking… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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