Changed Fog Bulb From 42w To 65w Ok?

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Old 05-29-08, 02:38 PM
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Changed Fog Bulb From 42w To 65w Ok?

I Put New Fog Bulbs In My Car But They Are Higher Wattage. Will This Affect Wiring Or Fuses. Original Were 42w These Are 65w. Anyone ?
 
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Old 05-29-08, 04:38 PM
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You are increasing the wattage by about 50%. What would be a help would be to know whether the lights are direct wired to the switch or through a relay. Also the fuse size. Factory wiring and fuse size are designed to meet a specified load. You may be overloading the circuit, especially if the lights are on for a lengthy time. Could be a fire hazard.
 
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Old 05-29-08, 07:25 PM
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thanks for the info it goes to a 20amp fuse and a relay. what can i do to keep these bulbs? if i change the wires, what guage should i go to and how far do i need to replace up to. thanks gjr
 
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Old 05-29-08, 07:35 PM
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You want to rewire everything just to have 23 more watts?

If you do, the entire circuit needs to be replaced with at least 18 gauge wire if this lighting circuit is not shared with another accessory. If it's shared with say...the blinkers too, I would go 16gauge.
 
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Old 05-30-08, 06:45 AM
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I dont really see the need to rewire anything to use slightly higher wattage bulbs your fuse and relay and wiring should be fine your only talking about an 4-5 amp increase on the circuit thats for both lamps.
 
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Old 06-02-08, 12:13 PM
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Another concern I might mention is the extra heat generated by the larger bulbs might damage or melt the fog lamp housing. It seems like everything is made of plastic in modern cars, and the added heat may melt, warp, or otherwise damage the housing or lens.
 
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Old 06-02-08, 01:38 PM
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In addition, fog lights don't need to be "bright", as they are just illuminating in front of the vehicle. Driving lights are a different animal.
 
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Old 06-07-08, 09:58 AM
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Is there anything else on that 20amp fuse. 42w divided by 12v=3.5a. 65w divided by 12v=5.4amps x 2 lamps=10.8amps. plus 20% for resistance and relay draw another 2 or 3 amps. if you can make sure there is no other lights on the circut. the fog lights are just under 14amps you should be fine. I bet a 10a fuse would blow and a 15 would not you could try lower amp fuses just to see if my calculations are right.
 
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