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ceagleson
New Member
4 Posts |
 Posted - 01/19/2011 : 03:35:08 AM
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| I have two 2002 FS-65 freightliners with 3126E cats that only work on high beam if the intake heater is on. I have checked all ground and power studs on firewall. |
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 01/19/2011 : 06:48:10 AM
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| I would check the power stud where your intake heater relay picks up it's 12v. Follow it and you will probably find a loose or corroded cable. Your lighting power may share the same source. I don't have a diagram handy to verify this. |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
Edited by - Wolf0r on 01/19/2011 06:48:45 AM |
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ceagleson
New Member
4 Posts |
Posted - 01/21/2011 : 05:27:14 AM
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| Have checked the power studs and all battery cables. Have found that the intake heater relay power is not the problem. I disconnected the power at relay and problem cont. Unpluged ECM control wire or remove intake heater light bulb from dash claster I no have no headlights. I have replaced headlight switch, daytime running lights mod., and turn signal switch. |
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Harrison Fire
Senior Member
United States
175 Posts |
Posted - 01/21/2011 : 08:49:25 AM
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Did you find the stud on the frame - inboard side -just in front of the starter. I have had that one get loose with the stud almost cooked through.
HF |
My Fleet? (6) 93/99 IH 3800 Thomas and Blue Bird, Hydraulic Brakes, Manual and Auto Trans, (10) 00/06 FS65 Thomas Air Brake and Auto Trans, (2) 06 C2 Thomas and (2) 09/10 IC CE 300, Plus 3 more from another District |
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bwest
Administrator
United States
3820 Posts |
Posted - 01/21/2011 : 09:33:01 AM
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| I think your problem is up by the hood hinge. There is a connecton or a wire (can't remember which) that either comes apart corodes or something. It's been a couple of years but I had the same problem and that is what I found. I think it's the right hinge but don't hold me to that. Good luck. |
Bryan |
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Spar
Active Member
20 Posts |
Posted - 01/21/2011 : 1:18:11 PM
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I'd start at the headlight, are you losing power or ground to the low beam?
Do the headlights and intake heater relay share a common ground point, or power point?
I'm not familiar with the cats in a freightliner, nor have I seen a schematic for one so this just questions that might point in a direction. To me it sounds like a broken ground for the intake heater that is finding ground through the low beams - but again without seeing a schematic I'm just guessing. |
It's a machine, not a werewolf. |
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bwest
Administrator
United States
3820 Posts |
Posted - 01/22/2011 : 05:46:25 AM
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| Just thought of something. Have you checked the ground cable from the engine to the frame? |
Bryan |
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Topic |
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Headlight problem with fs-65
