Fuse and relay layout Engine compartment fuse box, also known as Engine Junction Box (EJB): 1.2. Fuse information F1 – 10A – Transmission control module; F2 – 5A – [Diesel engines] Glow plug monitoring, [1.6 Dura tec-16V Ti-VCT] Degas valve; Pliers. Replacement glow plug timer. Socket set and ratchet. Screwdriver set. Step 1: Disconnect the battery. Always disconnect the negative battery cable on the car battery to cut power when working on any electrical system. Step 2: Locate the glow plug timer. The glow plug timer is located in the engine compartment. Posted October 15, 2022. Glow plugs are to assist starting when very cold. They are used when they are not essential, it helps start quicker and smoother on warm up and better for emission output whilst warming up. Most cars in our climate can still be used with no glowplugs ( but rougher starting and more emissions) . a starter relay will not hold up for use as a glow plug relay. they are not designed to take the current required to fire the glow plugs and will burn out quickly. I did a search on the topic of using a fender mounted style ford starter relay/solenoid for glow plug duty and I read back through about 5 years of posts. Cold your WTS light should be on for 12 seconds. Replace the controller or wire the relay to a push button. Check the glow plugs, short cycle times are classic for a couple burnt out glow plugs. To test use an automotive test light. Clip the ground clip to the positive battery termonal. Short clip on a 1988 Ford F-250 7.3L idi to show the glow plug location and how to locate them to change the glow plugs.Video recording equipment:GoPro Hero The glow plug system changed between 86 and 87. The 83 thru 86 had the old style glow plug system. The 87 thru 94 had the new style system. They have nothing in common as far as parts go other than the names. new style relay controller located on the back of the intake manifold old style relay mounted on the inner fender Considerable difference. 6005 posts · Joined 2004. #2 · Dec 12, 2005. If it was a fuse the problem would be a completely down GP system, if your problem is intermentent, then I don't think it would be a fuse. To be honest I don't know if there is a fuse for the GP's the owners manual should show it. Why don't you tell us the specifics about your problem so we can The GPR it self is located behind the fuel bowl on the passenger side. it's brown you should have two that look similar, the 1st is the AIH relay, and the 2nd one is the GPR it's father away from the bowl. It's that time of year I'm chasing down a GPR / glow plug issue my self. Reply Like. # 3. 09-07-2009, 03:05 PM. The glow plugs are controled by the PCM (powertrain control module)it behind the left front wheel, remove the wheel arch liner and the pcm cover. it will have to be programed by ford if you replace itif you think that this is the problem with your car then the best thing to do is take it ford for reprograming or replacement .. QCgX.