Greetings one and all.
I just ordered the Rockauto (8) Motorcraft ZD29 and the controller. The current location being buried on the back of the engine and no shield around the turbo. I will splice into the controller white wire and run a 14(?) ga wire to a toggle switch in the dash. Toggle on, normal operation. Toggle off, and override the system. Toggle on, controller has normal operation. Toggle off and good luck starting when cold. Also able to override once running. Relocation of the controller away from the turbo is needed and will be fun as both inner fenders have items mounted on them.
That is the game plan currently.
I should plug in the extension cord and see if it will do a heat assist start with no glow plug action.
That ought'a be fun.
Be sure you know what you are doing with the wiring. You should never use a maintained switch for a manual button. It's too easy for that switch to get knocked in the wrong position and burn up all your glowplugs. And those things as you found out are not cheap.
The white wire on the controller comes from the brain of the controller. It's what activates the original glowplug relay by grounding the white wire terminal. When you add a manual button, you are pulling the white wire off, taking the brain control away. You are adding a momentary pushbutton to the white wire location, so YOU have control of the glowplug relay, not the brain of the controller.
One single wire to one momentary button. I do not recommend doing it any other way.
