300stw

looking for instructions and /or pics to install a relay in the ignition switch circuit to be proactive about problems,,
i see Jim Lane has mentioned it , cant find a write up about it,

i did the headlight relay, and the blower motor relay upgrades allready

Jim Lane

Here is how I installed my remote Start Stop switch with interlock.

https://www.dieseltruckresource.com/...h-t197607.html

This takes the load off the ignition switch.


Jim

BearKiller

I take it you are meaning to have the KEY=ON=HOT wire to trigger a relay that carries the load for all the KEY=ON accessories.

Thus, the key-switch would only carry the current necessary to trigger the relay.

I have done this on a few vehicles and it is the same principle as the head-light relays.


Instead of a relay, considering some of the higher amperage draws of some of the components, it is best to use a rather high capacity constant-duty solenoid, instead of a relay.

Then, such things as the blower-motor can even be relayed again by their own dedicated relays.


I am currently in the process of moving all of the KEY=ON accessories of my F-350 away from the key-switch circuit and onto a solenoid.

My aim is to be completely rid of the key controlling any of the electrical functions, save for the START button circuit.

Jim Lane

Wasn't really sure what you meant, my fuse panel is controlled with a 75-amp Bosch relay and is triggered by the ignition switch.

I think there is mention of it in my Blower Motor article but it doesn't go into detail.

Ill have to check into it.

Jim