Loop to pencil style glow plug conversion.

Never glow longer than 60 seconds or you risk burning out the glow plugs.

This is a homemade system that works = not for use on show cars.
Note: With minor alteration this circuit can be used on almost any diesel glow plug system.

For safety and durability: You need to use:
* 4 AWG wire for the glow plug circuit
* Make one 8 AWG jumper wire per glow plug, going to the relay.
* 12 AWG wire for the activation circuit

AWG is American Wire Gauge.
The following sites may be useful to bookmark:
Amps and Wire Gauge - 12V Circuit
American wire gauge - Wikipedia, the free encyclopedia

Note: I have seen this system installed (functional) with standard residential wire as an emergency field repair, but do NOT recommend using it.

For safety: You must have two fuses in this circuit:
* 60 AMP fuse as close to the battery as working space allows in the (glow plug feed) primary battery (+) cable.
* 10 AMP fuse where the solenoid activation circuit draws battery power from.
I suggest a 60 AMP fuse with Four glow plugs.

Maxi fuses are color-coded
Red is 50 AMP
Blue is 60 AMP
Clear is 80 AMP

I suggest a spring-loaded push button momentary switch mounted in the knee panel, but have seen household light switches used successfully.

Never glow longer than 60 seconds or you risk burning out the glow plugs.

I use a Ford starter solenoid for convenience, simplicity, and availability.


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