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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: Mikeymike383 on December 30, 2015, 12:42:12 pm

Title: what wires do I hook up
Post by: Mikeymike383 on December 30, 2015, 12:42:12 pm

I need 2 know what wires do I hook up 4 my amp gauge 2 work. and what wire do I hook up for my coolant gauge. pics would help. po cut alot of connectors engine side

Title: Re: what wires do I hook up
Post by: bd on December 30, 2015, 01:16:00 pm

Year/Model of vehicle?

Do you have a factory ammeter (1967 - 1975 model trucks) or a voltmeter (1976 and later)?  Depending on the year, factory ammeters were protected by two 4-amp (glass) or two 5-amp (plastic ATO) fuses.  It is not uncommon for one of the two fuses to blow and/or oxidation to develop in the fuse box, interfering with the electrical connection of the fuses.  If you haven't already done so, verify all of the fuses and their connections before chasing wires.

Title: Re: what wires do I hook up
Post by: Mikeymike383 on December 30, 2015, 04:00:09 pm

ya it's has all the stock gauges from 73. mine is a 73. the guy b4 me cut alot of the wiring in the engine bay. that's why I'm asking 4 pics

Title: Re: what wires do I hook up
Post by: bd on December 30, 2015, 04:49:05 pm

The 1973 Wiring Manual (http://www.73-87chevytrucks.com/techinfo/7387CKMans//Wiring/X_7305_1973_GMC_Truck_Wiring_Manual_CK_10_30_Pgs_Only.pdf) should have the information you need.  The two 4-amp ammeter fuses are short glass fuses that reside in separate black rubber holders - one off of the firewall junction block and one near the firewall bulkhead connector.