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m1008 no head lights, horn, brake lights or black out lights

gmjunky87

gmjunky87

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sorry if this is redundant. started truck. no headlight, signals, brake lights, horn. made sure black out switches were in proper place. tried to turn black out lights on, nothing. checked head light fuse, it's fine (checked fuse with test light). unplugged black out switches and bypassed the switch. still nothing. not sure what else it could be.
 
jcollings

jcollings

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Yeah that fuse and block takes a beating with all the load for the 12 V circuit. Definitely something to watch I'm debating whether to change my block/rewire or not, Is work in progress.

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gmjunky87

gmjunky87

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I checked the main junction block on the firewall, it's past the fusible link. I'll have to take the junction apart at the firewall I guess. It seems like it would be something related to the blackout lights that's why I disconnected the plugs on the switches and made two jumper wires for the service light switch. I'm just stumped because I have power on either side of the fuse for the headlight
 
jcollings

jcollings

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So the junction block you have 12 V going into it and 12 V coming out going through the firewall to your fuse block?

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gmjunky87

gmjunky87

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Yes 12v going out also.
glow plug system works. Voltmeter on dash has never worked. One of the gen lights doesn't work but it's been that way a while ,(i shorter the fusible link once and prob burned out the bulb, I just charge the back battery)

When you turn the key on wait light, oil light, other gen light, water in fuel light come on and go off like normal.

I don't have access to the truck right now but I think I'll take the front battery out and check the wiring (I've been having rodents, truck doesnt get driven often) also start taking apart the bulk head to the firewall apart to clean it. I suck at reading wiring schematics but from older posts I've read i know a lot go through the head light circuit but it's acting like I have the service light switch off even though I have it bypassed.

Also I installed led headlights about 5 years ago to take some load off that circuit.
 
jcollings

jcollings

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LED, Those usually have some kind of driver set up which modifies the whole headlight system correct

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gmjunky87

gmjunky87

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jcollings said:
LED, Those usually have some kind of driver set up which modifies the whole headlight system correct

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Click to expand...
The led lights didn't take any modification, they were plug and play. I still have the original square fuel filter with all the wiring for the baseplate if that's what you're referring to. Thanks 👍
 
jcollings

jcollings

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I've seen some LED lights that are required drivers and different type of hook up in wiring.

I still have the square fuel filter myself

I hope you get it. Good luck

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