Hi Folks,
So here's the deal. Now that I have my A/C, in my 68 Coupe, up and running I find that the plug on the back of the ignition switch gets kinda warm, especially when fan is on high. This tells me that the overall draw through the switch is a bit excessive, this seems natural, especially when considering 40+ year old wires, etc. I have a sort of simple idea to reduce the stress on the old wiring without totally butchering it or replacing it and would like opinions and thoughts on my plan. First off, everything electrical works with no intermittent connections. My thought is to:
1>Cut the main fat wire that comes off the "A" terminal of the ignition switch that provides "key on" power to all accessories and signal lights, etc.
2>Use this feed from the switch to activate/trigger with the key on a relay (60 amp or more) powered direct from the positive battery cable at the solenoid.
3>Run the load side/terminal of the relay to a 4 or 6 circuit fuse block located under my dash
4>Use one circuit of the fuse block to feed the other side of the wire that I cut from the switch, basically putting the relay "in line" to supply the accessory circuit and taking the load off the original switch and wiring.
5>Use another circuit from the fuse block to power the heater/AC system.
6>Still have 2 or 4 fuse circuits for possible future items.
What do you all think? Any pitfalls I'm not seeing?
Thanks All,
Gene
So here's the deal. Now that I have my A/C, in my 68 Coupe, up and running I find that the plug on the back of the ignition switch gets kinda warm, especially when fan is on high. This tells me that the overall draw through the switch is a bit excessive, this seems natural, especially when considering 40+ year old wires, etc. I have a sort of simple idea to reduce the stress on the old wiring without totally butchering it or replacing it and would like opinions and thoughts on my plan. First off, everything electrical works with no intermittent connections. My thought is to:
1>Cut the main fat wire that comes off the "A" terminal of the ignition switch that provides "key on" power to all accessories and signal lights, etc.
2>Use this feed from the switch to activate/trigger with the key on a relay (60 amp or more) powered direct from the positive battery cable at the solenoid.
3>Run the load side/terminal of the relay to a 4 or 6 circuit fuse block located under my dash
4>Use one circuit of the fuse block to feed the other side of the wire that I cut from the switch, basically putting the relay "in line" to supply the accessory circuit and taking the load off the original switch and wiring.
5>Use another circuit from the fuse block to power the heater/AC system.
6>Still have 2 or 4 fuse circuits for possible future items.
What do you all think? Any pitfalls I'm not seeing?
Thanks All,
Gene
