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12-24-2003, 01:56 AM
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#1 |
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Some like em' long!
Join Date: Nov 2002
Location: Grace, Idaho
Posts: 69
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melting fuses ?
for my brake lights on my truck, the circuit is rated for a 15 amp fuse, and it has a ten amp in it. what causes the fuse to just melt the one side of the plastic on the blade fuses? the fuses arent blowing, just melting and causing circuit to fail.
chevyforever
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1971 chevy c10 lwb- 300 hp 350 crate motor, soon to be more with ported and polished 62cc chamber 461 double humps, TH400, 3.73 posi, used to be my uncle's truck 1972 chevy k10 lwb- 350,4 spd, old and tired, dad bought brand new and is now mine 1968 chevy c20 lwb- 327, 4 spd, was originally a 50th anniversary truck 1990 GMC K1500-just my runaround truck 1982 Chevy K10 shortbed, new motor and new paint, another project in the mix of the others. IMPORTS SUCK! |
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12-24-2003, 02:12 AM
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#2 |
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97' Tahoe 2dr/2wd
Join Date: Jul 2002
Location: Huffman,TX
Posts: 1,168
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melting would be from excessive heat, but if it had excesive heat, that should be from excessive current, but if it had excessive current then the fuse should blow,,,, right?
so i don't know why it would be hot and not blow.... seems like it would blow the fuse, hook up an ammeter (if you have access) just for kicks in place of the fuse and see how many amps the circuit is drawing thats where i would start |
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12-24-2003, 02:32 AM
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#3 |
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Registered User
Join Date: Apr 2003
Location: missouri city, tx
Posts: 4,486
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melting? you must be pumping a cheeseload of amps through there!
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70 longbed 496/th400/Ford 9" |
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12-24-2003, 05:41 AM
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#4 |
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PROJECT 7DEUCE
 
Join Date: Dec 2002
Location: GRANTS PASS OR
Posts: 21,603
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Did you say blade type of fuse??? Do you have an aftermarket harness? Maybe the taillight and another acc is ran together in the fuse block ??
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GO BIG GREEN  GO DUCKSMEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P.. |
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12-24-2003, 08:19 AM
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#5 |
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Registered User
Join Date: Jun 2002
Location: central pa
Posts: 1,525
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If the contacts on the fuse block get corroded it builds up resistance and you get a voltage drop and then the connector starts to drain current and heat up before it gets to the fuse. Clean the contacts well spray cleaner normally is not enough, try using a good red rubber eraser from a pencil then spray with a contact cleaner. Once it is cleaned good put some dielectric(electrical grease) grease on it. what will happen is it gets worse and even a 5 amp fuse will not blow the contact will melt and the wire before the fuse will start to melt and the wire harness is next to go. The only thing you can do if it is to bad is replace the fuse block and the wire harness end. or cut the wire and replace the connector with a donor. hope it helps.
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72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne |
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12-24-2003, 07:07 PM
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#6 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Also if the connector is loose on that blade it will heat up.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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