Glow Plug Controller Relay Wiring

Reply Subscribe

Thread Tools

Search this Thread

Feb 23, 2014 | 12:17 PM

johnboyky

Thread Starter

New User

Joined: Feb 2014

Posts: 2

Likes: 0

Glow Plug Controller Relay Wiring

I just bought a hard to start 1990 F250. Per the board, just replaced all 8 glow plugs with Motorcraft. Still wouldn't start (it turns over but will only start if you use either). I attempted to install a new BWD brand (Borg Warner I believe) glow plug connector relay today...I removed the old no problem, but am unsure what wires to plug where....the only connection that I'm sure about is the blue wire that works the WTS feature...it plugs in easily but I don't know if there are other connections that need to be made or not? All the wires run from the posts and into the bottom of the unit. Any help the experts can lend is greatly appreciated.

Thanks,

J

Feb 23, 2014 | 12:24 PM

Franklin2

Moderator

Joined: Jan 2001

Posts: 57,027

Likes: 2,759

From: Virginia

Does the picture below help?

Watch your volt gauge in the dash when you go to start the engine. If the glowplug system is working, you will see the gauge drop to 8v or below. They draw lots of current when they are working.