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Old 08-10-2013, 10:44 PM   #1
Join Date: Aug 2013
Posts: 66
Hot Class A light Switch 90 Hawkins MC

My main light swith is very hot to the touch, I have only had this Hawkins 36 ft, cat 3208 for a week, While fixing all the little stuff, I repaired all the rear Tail/stop lights there are 4 on each side, plus one stop light in the middle rear, they all were corroded somewhat but i got them all working again, after returning to the drivers seat i smelled something hot and sure enough the headlight switch was so hot i could not leave my hand on it when i reached under the dash, my first thought is to much resistance with all the corroded lamp holders, I am thinking of adding led stop/tail lamps and remove the existing 1157 lamps, also changing the upper marker red lights with leds, anyone have similar problems? I could also change all the other marker lights to leds if anyone has any tohughts please let me know. Thanks Muledeer2

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Old 08-11-2013, 12:13 AM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
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Welcome to iRV2, main problem with the older headlight switches overheating , is usually the dimmer control for the dash gauges, it's a big rheostat and can generate a lot of heat through the knob.
Problems with tail lights will usually blow a fuse , before O'heating the switch, and the headlights are on an internal circuit breaker in the switch, so if their in trouble they start flashing.
Most MHs have a headlight switch from an older 73>76 Chev P/U that can be purchased at any auto parts store.

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 08-11-2013, 12:27 AM   #3
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Join Date: Apr 2012
Posts: 1,414
Resistance in a light socket will lower current. Current is what makes heat in a lamp, corroded connection and toaster. Resistance will lower current just like a kink in a garden hose will reduce water flow. Fuses protect from to much current-ampers. Fuses are rated in ampers as example 20 amp fuse. Resistance lowers current but makes heat so a fuse will not blow with a resistance in a circuit. Your light switch, just as Skip says is probably the dimmer rheostate for the guage light circuit. Turn the switch knob to turn up the guage lamps to full and the resistance will drop and less heat should result. Hope this helps.
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02 Discovery with Accord toad
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