Wire rating from FEM to Fuse box - for Headlamp Dip
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Join Date: Feb 2014
Location: Crossroads of America
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Glad you've found the problem!
I just googled "Automotive Wire Gauge Chart" and came up with these links, which vary between 18 and 16 gauge for 2-foot length at 40 amps.
Automotive Wire & Wiring Guide from TESSCO - TESSCO.com
http://tinyurl.com/mpnym7o
http://tinyurl.com/km6xtrk
Cheers,
Don
#3
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Hi Don, I have not confirmed wiring as yet but I am thinking everything points to a bad wire from FEM to fuse box, I hope to get onto it today or tomorrow You say the wire is rated at 40 amps, but the fuse is only 20 amps, is this a normal calculation tha the fuse if half the rating of the wire, this is for future reference.
cheers
cheers
Hi Rob,
Glad you've found the problem!
I just googled "Automotive Wire Gauge Chart" and came up with these links, which vary between 18 and 16 gauge for 2-foot length at 40 amps.
Automotive Wire & Wiring Guide from TESSCO - TESSCO.com
http://tinyurl.com/mpnym7o
http://tinyurl.com/km6xtrk
Cheers,
Don
Glad you've found the problem!
I just googled "Automotive Wire Gauge Chart" and came up with these links, which vary between 18 and 16 gauge for 2-foot length at 40 amps.
Automotive Wire & Wiring Guide from TESSCO - TESSCO.com
http://tinyurl.com/mpnym7o
http://tinyurl.com/km6xtrk
Cheers,
Don
#6
Join Date: Feb 2014
Location: Crossroads of America
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Partick makes a good point. I was not looking at the schematic and was assuming the wire in question was after the 40-amp relay and that the wire should have at least an equal rating to the relay. If the wire in question only carries the control current for the relay coil, I can be of the same gauge as used for most of the control wiring in the vehicle, and it's rating will depend on its length. If you have a caliper and can measure the diameter of the conductor in the existing wire, you can calculate its gauge with information easily found through a google search.
Cheers,
Don
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