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Re: How do you change the glow plugs and relay in a F350...
Hello, here is the proceedure. Any questions please ask. Good luck.
The red-striped wires on the 1994-96 DI Turbo engine carry 115 volts DC. A severe electrical shock may be given. Do not pierce the wires.
Make sure the ignition switch is OFF.
For 1994-96 engines, remove the valve cover.
Disconnect the wire connector from the glow plug.
Using a 10mm deep socket, with enough clearance as to not break or bend the wiring connector, unscrew the glow plug from the manifold.
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The relay is in easy view on the top of the motor, a little to the right side (passenger side). You will see two identical relays. One of them, the large battery cable goes to the intake air heater. The other relay is for your glow-plugs.
glow light bulb could be burned out.but glow plugs is control by ECM AND RELAY.do your vechicle start but you dont see glow plug light on to let you know glow plugs are energized heating up.also check glow plug fuse, look in owner manual in glovecompartment it will show all fuses and relays locations.
THE BLOW PLUGS ARE UNDER THE VALVE COVER HOWEVER YOU CAN REMOVE THEM BY REMOVING THE GLOW PLUG HARNES FROM THE HEAD ( IT IS ON THE EXHAUST SIDE AND EACH GLOW PLUG HAD A "CONNECTOR THAT GOES THROUGHT THE HEAD ITS CIRCULAR ABOUT 1/2 - 3/4 INCH IN DIAMITER) AND REMOVE THE GLOW PLUG WITH A 10MM DEEP 1/4 INCH WITH AN EXTENSION
Your glow plug relay is located on the top of the
engine on the right side toward the front. Some models there are 2 solenoids. A
large one toward the front and a smaller one right behind it. The glow plug
relay is the smaller one toward the rear. The larger front one is the intkae
heater relay. To test the glow plug relay turn engine to on. dont start it.
both of the large terminals should have power with key on. then turn engine
off. only one large terminal should have power. If when you turn engine to on
you only have power on one side then go to this test. Turn engine on and test
smaller wire. it should have power. If it does replace the relay. If the
smaller wire does not have power you have an ignition problem or power (wiring)
problem to the relay. Also note the engine needs to be cold. If temp of engine is over 130 the computer will not turn the glow plug circut on! Most of th time this is what fails and not your glow plugs.
Yes, You Can do it. Normally Glow plugs located near the Injectors. But you have to use Rust off Liquid.(WD 40) Because, When you try to remove glow plug it can broken.If glow plug broken you have to dismental your engine Head.
I can solve this problem for you but I need the right information. They have your truck listed as a 2003 F-350. Then it is also listed as a 2007 and want to know where the glow plug relay is. I need the correct year and model with the proper engine displacement.
The relay should cost about $35-45. A common Ford Starter relay can be used in place of the official glow plug relay. All that is required is a relay with terminals that have 5/16 or 3/8 terminals and can carry about 150-200 amps. When all 8 glow plugs turn on, it draws about 150 amps is all. There are two relays for the 7.3 diesel. One energizes the glow plugs and the other energizes a heating element in the air intake. That one is used to help eliminate white smoke while warming up and is turned on and off by the engine computer. It is usually only called for when the temperature is 20 degrees F or lower. Otherwise only the glow plug relay works.