Question about Cars & Trucks
Disconnect the lead to the glo-plugs and install a multi meter on the end of the wire .red lead to the wire and black lead to earth . set meter to read volts DC and turn on the ignition to start position . If there is power in the wire the meter will read 12 volts. If nothing then check the realay and fuses.
Posted on Jan 03, 2014
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Posted on Jan 02, 2017
the best way i have found to test glow plugs is to disconnect the wire to the plug and get you 12volt test light and put your negitive lead of the test light on the positive battery cable so when you touch the test light to any ground the light will light. so now go check your glow plugs and if you have one that doesnt light the light its burned out.
Posted on Oct 27, 2008
My vanette had exactly the same problem yesterday. The glow plugs have a timer and a relay. I think that if the light on the dash goes on and off as normal then its probably the relay not the timer. So I have replaced the relay (£50 nissan dealer only) which is located in the center console below the radio/heater controls. Until its really cold again tomorrow I wont know if its really cured it but I'm fairly certain that will be it.
Posted on Nov 01, 2008
SOURCE: 1997 VW JETTA DIESEL GLOW PLUGS
You have to replace the defective glow plug. You can test the glow plug without the test light. Just put a wire on the bolted end of the glow plug and connect this to the battery (+) terminal. Then, put a wire around the body of the glow plug and connect this to the battery (-) negative terminal. Hold at this position for a minute or less. Good glow plug will heat up.
As far as the wiring schematics, I will just describe
it. Your ignition switch is connected to the positive
terminal of the battery by way of the fuse in the fuse
box. From the switch it goes to a timing relay before
going to the glow plug terminals. The glow plug body
is screw mounted to the engine block which serves
as the negative terminal. So, as you switch your
ignition, it heats up the glow plug enough to give a
combustion of the atomized fuel in the cylinder piston
of your car causing it to run.
Posted on Nov 21, 2009
Tips for a great answer:
Dec 27, 2013 | 2007 Ford Ranger FX4 Off-Road
Feb 25, 2011 | 2006 Ford F 350 Super Duty
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.
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