Hot ignition switch
- Thread starter chaparralman
- Start date
The early CAV has a 15 amp ignition switch with all of the current needed to run the car going thru it. Napa sells a 45 amp switch with a starter lock out (after you try and start it once) that is similar to what is in the car.
I added a seperate #10 wire that runs up to the fuse box and that powers the lights and other non ignition related items.
There are already sufficient relays in the system, but they all pull primary power thru the ignition switch and that is the problem.
Dave
I added a seperate #10 wire that runs up to the fuse box and that powers the lights and other non ignition related items.
There are already sufficient relays in the system, but they all pull primary power thru the ignition switch and that is the problem.
Dave
Casey
You need a good relay in your accessory circuit right at the fuse panel, let the key operate the relay coil, and let the relay handle the feed with your fuses or circuit breakers coming off that main lead. I have seen ignition switches fried from too much being put through them, and some keys hot to the touch from the same.
You should be able to insert the relay in line with little trouble, and if space is a consideration there are some small units that will handle a lot of current.
Hope this helps
Phil
You need a good relay in your accessory circuit right at the fuse panel, let the key operate the relay coil, and let the relay handle the feed with your fuses or circuit breakers coming off that main lead. I have seen ignition switches fried from too much being put through them, and some keys hot to the touch from the same.
You should be able to insert the relay in line with little trouble, and if space is a consideration there are some small units that will handle a lot of current.
Hope this helps
Phil
TonyM
Lifetime Supporter
Hi,
A simple search on the forums would have revealed the answer, see link below.....
http://www.gt40s.com/forum/cav-gt40-talk/19902-ignition-upgrade.html?highlight=Ignition+Switch
A simple search on the forums would have revealed the answer, see link below.....
http://www.gt40s.com/forum/cav-gt40-talk/19902-ignition-upgrade.html?highlight=Ignition+Switch
http://www.gt40s.com/forum/cav-gt40-talk/18277-fun-relays.html
previously posted link was bad...
Eventually, because I had upgraded to larger/stronger SPAL fans, under full load, the switch was frying when A/C, headlights, then fans would go on. Not only was the switch overloaded, the wires were also too small to handle the amperage requirements of the new fans. Funny thing was, the fan specs said 60+amps when kick-in occurred; yet never blew the 20amp fan fuse. Then the 20 amp fuse did not let enough amps in to initially trip the relay...bigger wire and 30 amp fuse solved the "clicking" problem I had with the fan relay. I have to rethink this because the fix seems to negate the fuse protection objective, inspite of everything working fine now.
previously posted link was bad...
Eventually, because I had upgraded to larger/stronger SPAL fans, under full load, the switch was frying when A/C, headlights, then fans would go on. Not only was the switch overloaded, the wires were also too small to handle the amperage requirements of the new fans. Funny thing was, the fan specs said 60+amps when kick-in occurred; yet never blew the 20amp fan fuse. Then the 20 amp fuse did not let enough amps in to initially trip the relay...bigger wire and 30 amp fuse solved the "clicking" problem I had with the fan relay. I have to rethink this because the fix seems to negate the fuse protection objective, inspite of everything working fine now.
This seems a fairly common issue, my car is a DAX40 and I noted that the plastic boots on my ignition switch connectors had partially melted and fused together.
Not sure at the moment what is wired thru the ignition switch, but lights and horn and fans are not. I'm working on a wiring diagram at the moment, so will find out and get a relay in there in a short while.
Suggest everyone be aware of this and check it out.
Dave
Not sure at the moment what is wired thru the ignition switch, but lights and horn and fans are not. I'm working on a wiring diagram at the moment, so will find out and get a relay in there in a short while.
Suggest everyone be aware of this and check it out.
Dave
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