Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I'm working on a 3406e (6ts04777) I'm trying to get the Jake
I'm working on a 3406e (6ts04777) I'm trying to get the Jake beaks working can you tell me how to run a jumper wire to bypass all the switches so I can have a starting point… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
210 satisfied customers
I have a 379 Pete, the jake does not work. I have no power
I have a 379 Pete, the jake does not work. I have no power to the jake brake switch. Is this my problem?? … read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
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Cat 3406E S/N 5EK19196 in a 1995 peterbilt 379. I am getting
Cat 3406E S/N 5EK19196 in a 1995 peterbilt 379. I am getting problems with my water temp switch, engine fan either in automatic or manual. I am also getting a CEL when I use the Jake brakes. The water… read more
NicholasM1019
NicholasM1019
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Vocational, Technical or Trade School
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I did a engine swap on a 1994 Peterbilt 379 that had a model
I did a engine swap on a 1994 Peterbilt 379 that had a B model cat, I put a 3406e (6ts04777) I'm trying to hook up jakes and cruise but the wiring diagram doesn't explain what's 12volt power and groun… read more
catmastertech
catmastertech
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Vocational, Technical or Trade Scho
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On a 2005 Peterbilt 379 with cat ACERT C 15 engine why did
On a 2005 Peterbilt 379 with cat ACERT C 15 engine why did my Jakes only work in low and in the middle setting they do nothing and on the high setting I only get the low jakes… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 1996 model 379 peterbilt with a cat 3406e in it.
I have a 1996 model 379 peterbilt with a cat 3406e in it. The cruise control has started not working intermittently. I thought it had to be the on/off switch so I changed it and it still does the same… read more
BrentR718
BrentR718
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The engine fan will not come on automatically when water
The engine fan will not come on automatically when water temp gets high under a load. The fan works when I turn on manual switch and the fan works with the high pressure side of A/C. this is a C-16 en… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I have a 98 379 that the fan wont kick on after an inframe
I have a 98 379 that the fan wont kick on after an inframe new water pump, thermostats, new sensors. On the computer it says fan is constantly on … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
443 satisfied customers
I have a 99 Peterbilt 379 with a CAT C 12 engine that's over
I have a 99 Peterbilt 379 with a CAT C 12 engine that's over heating. I have replaced EVERYTHING and it continues to over heat only while loaded and going up a hill. Also only during the summer when t… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I changed rad in 99 Pete 379 so drained Freon out of a/c. My
I changed rad in 99 Pete 379 so drained Freon out of a/c. My engine fan doesn't stop unless I unhook air to fan hub. Engine water temp gauge doesn't seem to work now either. Everything worked before t… read more
Keiphun Sowell
Keiphun Sowell
Owner Brothers Restoration/Troubleshoot
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Lost power to my headlight and marker light switch on 2007
lost power to my headlight and marker light switch on 2007 379 pete … read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,636 satisfied customers
I recently lost my Jake's on my 3406e 1998 Pete. I manually
I recently lost my Jake's on my 3406e 1998 Pete. I manually checked my Jake solenoids and they are working. My clutch switch is working. I'm not sure how to check the TPS sensor. The on off switch has… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Ecm coolant sensor is reading 20 degrees higher than dash
ecm coolant sensor is reading 20 degrees higher than dash gauge. when dash gauge reaches 200 the hot water light comes on then few seconds later stop engine light. check with inferred temp and dash ga… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
210 satisfied customers
2004 Cat C15 in a Peterbilt 378, VIN. 1NPFXBEX34D830549.
2004 Cat C15 in a Peterbilt 378, VIN. 1NPFXBEX34D830549. Jake brake is not working. Checking for voltage at the power supply to the Jake on off switch with a power probe, key on engine off, it shows 1… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
It is a 95 Peterbilt with a 3406e. The Jake brake is not
It is a 95 Peterbilt with a 3406e. The Jake brake is not working on low stage. We have ruled out switch. Wondering if there was a relay that worked the Jake … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I have a 97 Peterbilt 378. I had some welding done in the
I have a 97 Peterbilt 378. I had some welding done in the frame yesterday and the truck ran fine today. While driving today, I noticed my engine brake would only work when I pressed the brake pedal, a… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e
I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e 40 pin. What do I need for the cab. I have the harness from the ecm to the firewall from a donor truck. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
hi, my name is XXXXX XXXXX recently did a engine swap with a 3406e
hi, my name is XXXXX XXXXX recently did a engine swap with a 3406e cat from a 98 international to a 97 pete, I reused my old ecm with the international harness left untouched, everything works great, … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 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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