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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: jerrysdustydog on December 24, 2016, 06:14:16 am
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Just picked up a '84 C-10 that had been parked in Texas for 7-9 years and am going through it. Looks like part of the fuse block has power and part does not. Are there more than one feed to the block? I've found I think all of the fuseable links and checked them out but am scratching my head on this one. I pulled the connector block outside the firewall to check for bad connections, and everything looks good, but maybe the A/C, power window circuit and possibly others don't have power at the fuse block. I hate to think of pulling the inside block apart, but if need be, guess I will. I pulled the breaker out of the fuse block that powers the windows but no power to either side of the position. Any help appreciated.
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did you turn the key on?
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The vehicle has three fusible links - two at the starter and one at the firewall junction block.
There are two 12-gauge red wires feeding power into the cab through the bulkhead connector from the engine compartment. One of the red wires receives B+ through a fusible link directly off of the starter 3/8" battery cable stud. The other red wire receives B+ through two fusible links that are connected in series: one link connects directly to the starter 3/8" battery cable stud and feeds power to the firewall junction block above the back of the engine. The second link connects to the firewall junction block then splits through a splice, running to the alternator output post and feeding the firewall bulkhead connector. Determine whether B+ exists at the two bulkhead connector cavities before moving inside under the dash.
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Thanks, will check again today when I'm in the shop. Looks like there is maybe something that should be plugged in at the top of the fuse block? maybe 6 or so ports like something is missing?
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so you did try the key in all positions?
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No Tim, the truck appears to have the wrong key and wont come back to ACC. Have purchased another switch and have not gotton around to changing it out. I guess it could be the problem, only goes to start and run. I have what appears is something missing at the top of the Fuse block that has 6-8 blades? One position is Hot.
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...I have what appears is something missing at the top of the Fuse block that has 6-8 blades? One position is Hot.
Post a pic of the fuse box... and check for B+ on the two 12-ga red wires entering the bulkhead connector from the engine compartment.
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well acc wont really matter but some of the fuse panel only has power with the key on
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Problem solved. Loose connection behind the fuse block. Thanks guys!!!