Fuse box wires?620

[gearhead]

On my 74 620 pickup I cleaned the corrosion off the fuse box while tracing an intermittent charging issue.However it seems like some wires may be drawing a bit more power than they should.

 

What is the large red wire for?the plastic near its terminal was burned/melted.On the same connector block what is the white wire/blue tracer? It too was melted.Finally on the other connector what is the green/blue tracer because it was also melted.

 

Only the large red wire looked burned though.

[datzenmike]

Please put 620 in your title so all other Datsun owners don't have to open this topic to find out it for a truck. This will also help the SEARCH function to zero in on 620 fuse related problems.

 

 

What happens is that corrosion on the clips that hold the fuse are a slight resistance. Just like the heating element in your toaster. Resistance causes heat and the plastic melts. Additionally, the heat will take the temper out of the clips and they grip the fuse less tightly making matters worse.

 

The RED wire provides power to the lighting switch.

 

The WHITE/BLUE stripe provides power to some of the dash warning lights, turn signals, back up lights. Only on when ignition is ON.

[gearhead]

Ok I'll wire the headlights to go through a relay.That should take most of the current from that red wire.While I am at it anything else need to be relayed?

[seventhree.datsun]

Im haveing problems with my high beams on my 73 620 pick up ..I change the fuse box put new fuses...they still don't turn on please help ned high beam

[seventhree.datsun]

Im haveing problems with my high beams on my 73 620 pick up ..I change the fuse box put new fuses...they still don't turn on please help ned high beam