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Old 09-06-2014, 10:33 AM   #15
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Sounds like headlight relay is bad/weak. Due to the high amperage of headlights the full power doesn't run through the dash switch. Now where that is on any of our coaches I don't know.
Ray, Cheryl, O'Connell and of course Miss Molly Silky Terrier mix

2006 Dolphin 5355
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Old 09-07-2014, 02:49 PM   #16
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Lacking a schematic but having a knowledge of similar circuits in other vehicles I would suggest that starting at the switch or relay, whichever feeds the headlights with switch on, you need to find the high resistance in the circuit if the grounds are good. With the engine running and the connectors off the bulbs your voltage should be within a few 10ths of a volt of the voltage measured across the chassis battery approximately 13-15v.If all tests show good ground ,supply voltage within specs, and corrosion free connections at bulbs, new bulbs should correct this condition. Halogen bulbs can lose brightness over time. Also check reflective surfaces within headlamp assemblies . I have found bad grounds along steel supporting structure under dash behind grill area relating to wipers on my Tropi-cal ,possible that this area could be causing your concern. Modules cannot develop high resistance internally through semi-conductor material only at connections to the modules and other components along these circuits
Fred & Darla 2000 Tropi-cal and 2016 Chevy
Sonic toad
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Old 09-08-2014, 11:44 AM   #17
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Originally Posted by Tahiti16 View Post
Sounds like headlight relay is bad/weak. Due to the high amperage of headlights the full power doesn't run through the dash switch. Now where that is on any of our coaches I don't know.
I have the chassis owners manual, guess I will start by looking for location of the relays and see if I can change them and see what happens
Tom and Patty
The "Rode Crew"
2012 Itasca Navion J - Sprinter Chassis.
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