Question about 1998 Volkswagen Jetta

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No power is being sent to the glow plugs untill the motor start then test light stays on showing power I did a jumper to the battery and its putting power to the plugs manualy. I have new plugs/new harness and new relay... nothing has helped.

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  • Volkswagen Master
  • 1,011 Answers

When you light goes out it does not cut the power to glow plugs immediatelytest them with meter just after you turn ignion on

Posted on Nov 08, 2012

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Posted on Jan 02, 2017

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alicantecoli
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SOURCE: 2002 Jetta TDI has no power to glow plug buss at startup

replace the relay but check connections first as often connection get hot and corroded.failing which buy a push button switch use a relay and and some heavy wire to and from relay to the heaters and work them manually.you could try seperating the relay and cleaning the connections inside.

Posted on Nov 05, 2008

  • 1 Answer

SOURCE: No glow plug light, car turns over but won't start, no CEL or codes

I don't have the solution but a possible help in diagnosing.  If you remove the water temperature sensor connector from the sensor, the glow plug light should stay on when you go to start the car.  Try leaving it on for 15 seconds and then start the car.  If it starts right away, it is your sensor.  If it doesn't, the good luck.  
The sensor is located on the right side of the engine near the top, at the back.  It is in the coolant fitting directly behind the hose from the rad, just left of the thermostat.  Be careful to disconnect the wires, and not remove the sensor, or you will loose a lot of coolant.  The sensor is held in by a separate plastic clip, and the harness just has a little built in clip on the side.  Hope you have small hands...

Posted on Jan 06, 2009

  • 119 Answers

SOURCE: volks wagen golf diesel tdi Nreg

Check the glow plug thermo sensor...found in the cylinder head.
Unlightly anything wrong with injector pump.
Good luck
John

Posted on Feb 27, 2009

  • 102 Answers

SOURCE: 2002 Jetta TDI check engine light

very common for the harness that plugs onto the glow plugs to have too much resistance it will still work but will set codes

Posted on Mar 23, 2009

  • 320 Answers

SOURCE: No power to glow plugs...relay replaced...still no

There is a big fuse in the engine room for the glowplugs.
You'll find it just near the brake vacuum cilinder under a black cap...
Hear if the glow relay ticks when you'll put power on. Does the glow light lights on?

Posted on Oct 31, 2009

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1 Answer

Hi, 2007 Santa Fe pre heat light stays on for about one second which I've timed and won't start. Connected test light at plug to glow plug light on for 1 second


Sounds like a faulty glow-plug controller.
I have wired the glow plugs directly, and it worked fine until my brother held the button too long and burned them out.

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Have a 2001 excursion 7.3 deisel shuts off while driving security comes on sometimes blinks othertimes it dont but wait to start light might stay on 15 min &other times two minutes


The glowplugs are the second element for a diesel to start. When the timer sends spark to the glowplugs they must warm up to atomize the fuel. Each glowplug must be removed to test and if you do not want to replace all of them you check them by using jumper cables and a 12v battery. You would put the negative cable clamp on the thread housing and briefly touch the positive on the plug top. This can melt the part so realize that it is a comparison of how long and bright the part will glow. A dark result, slow to glow, is a worn out part. You would remove at least 4 plugs for your comparison at a time. Also check battery health as these parts need maximum juice to glow.

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Why will car not start from key? Just turns over until battery drained, seems too sluggish to start


Has the fuel pressure been tested? Are you sure the ignition starter switch is ok and doesn't have an open that causes a stall out when the key is released. We do not have the diesel engine in this country so repair info is limited. You need to stop guessing and consult an expert, you have replaced parts that I would never replace for this kind of issue, a total waste of money and your time.

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Glow plug feeder wire gets very hot on 1997 Escort Diesel Van 1.8l


Yes. I'll try to explain this. The glow plugs work by electric resistance. When they are clean and new, they work very well as there is no crud or coating on each part. The material composing each glow plug deteriorates over time something like a sparkplug.

The amount of time it takes to heat up increases as the glow plugs fail. This puts a strain on the wiring feeding the glow plug circuit.

You can test each individual glow plug using auto jumper cables and securing one end to the base and the other is briefly shorted to the top of the glow plug using battery voltage

Be careful-they melt. As you will see, some stay dark(bad) and some glow brightly(good). Or you can just put in all new glow plugs and be done with it.

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1 Answer

1998 jetta TDI glow plug dash light comes on for only one second


HAVE YOU CHECKED WHETHER THE FAULT IS ON THE GLOW PLUGS RELAY?

Nov 08, 2012 | Volkswagen Jetta Cars & Trucks

1 Answer

MY 93 FORD 350 7.3 I PUT SWITCH ON AND START CLICKING RIGHT AWAY BEFORE WILL TAKE FEW MINUTES SEEMS LIKE T GLOW PLUG IS NOT WORKING RIGHT IF I PLUG THE ENGINE WILL START WITH NO PROBLEM ,SOME PEOPLE


This is not to hard to solve. The outside airtemp determines how long the Glowplug timer works for absolute cold starts. Starting a warm engine is affected by underhood temps.

The Timer Relay will pulse power to the glowplugs. If the glowplugs are good, it is enough to preheat the cylinder for firing.

To tell if a glowplug is good is a matter of comparision between a new glowplug and a worn glowplug. YOU CAN MELT A GLOWPLUG WITH THIS TEST, but you remove the glowplugs, get a set of battery jumper cables and place one jumper to the base of the glowplug USING CARE not to ruin the threads on the glowplug.

You do not want to arc the spark on the glowplug threads. You want your fixed jumper connector locked on the base of the glowplug. The other battery cable jumper is touched to the top of the glowplug where the arcing occurs. This will not hurt the contact point if done properly.

You compare the "glow" of the old glowplug to the "glow" of the new glowplug. Bad glowplugs stay dark or operate at a darker color.

The Timer Relay gives you pulses and that is all the glowplugs get to heat up. This is what you simulate in your test. If a glowplug operates in a dull or dark condition, it is bad and throw it away. You want all glowplugs to readily light up when power is applied.

The other 2 parts to the system are the Timer Relay and the Power Relay. The timer gets its power from the Power Relay and the Power Relay is like a starter solenoid. The Power relay gets a tickler charge when the keyswitch is held to Start.

There are sometimes extreme cold Timers that hold the power longer tothe glowplugs. I do not have the Specs to tell you if your Timer is kicking out to soon.

I hope my solution helps. I have told you how to test your glowplugs. The timers are affected by air temperature and that makes it difficult to say if it is working long enough. If you know the glowplugs are good, and the timer shuts off before the glowplugs heat up, then you need a new or different type of timer.

Sep 26, 2012 | Cars & Trucks

1 Answer

Having cold start problems 2006 h.d. f350 ,truck is parked in heated garage all night,starts normal in the a.m.,sits outside all day at work,soon as temp falls below 30 F it starts then stalls immediately...


glow pug indicator and glow plug themself are 2 seperate system
test for power at the glow plug harness conector 1 each side over valve cover
test light clamp on batery neg test each wire going to relay for power on both side
then quick check on glow plug end test light clamp on positive test all wires
going to glow pug on each side f this does ligtht up the test light system should be o.k.
for the FICM i have used a hair blower on hi to warm the surface of if to start up a few of
these motors to get them back to the yard for replacment afterward
run a ffeet of these from 250 to 550 lots of problem and work 26 units
good luck

Feb 25, 2011 | 2006 Ford F 350 Super Duty

1 Answer

About 2 months ago my Ford ranger 2001 2500tdi started making a click sound when I try to start it. I later descovert it was only when I drove it for a while. In the mornings and at knight it started when...


Your diesel requires the glow-plugs to heat up to start when cold. This is why the truck smoked excessively when you pull it to start the motor. Siince you are not having the glow-plugs warm up via the "Timer" for them and you are getting intermittent Solenoid response from the tickler wires on the Solenoid, there is one common point.

The Ignition switch is the common point. You should also observe if your "Start" light is getting the feedback from the glow plug "Timer". Replace the Ignition switch and see if you hear the "Timer" clicking before a cold start. You can also take a 12 volt test-light or gauge and check the wires to the glow-plugs when cold. The glowplugs should be getting power from the until the glow-plugs heat up.

Remove and check the glow-plugs. A good way is to remove all of them, and take some jumper cables to each briefly. BE careful as they can melt and you can ruin the threads with the jumpers. Comparison is the best way to describe testing them. They should heat up the same for all. The glow-plugs that stay dark the longest are bad.

Ask the auto parts place if they show an Ignition relay for your Diesel. This would cover the poor starts when warm. Also tell them it is a Diesel when getting the Ignition switch.

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2 Answers

BAD COLD START NEW GLOW PLUGS STILL BAD START GLOW PLUG LIGHT STAYS ON


You have to check if you really glows comes to power that can show you the light on the dash that are working and maybe the relay of the glows does not work and you will pass voltage. Try a thick cable you put something in the battery positive and the other end touch the tip of the glow should produce a spark pquena holds about 20 or 25 seconds and give him star should work well. Thanks

Feb 27, 2010 | 2003 Renault 181

2 Answers

1997 VW JETTA DIESEL GLOW PLUGS


The glow plug relay is responsible for the duration of glow plugs, this needs to be the starting point. You should get a 12v out for so many seconds when ignition is switched on.
I have taken the cover off relays in the past, cleaned up the internals, sprayed with circuit cleaner and got plenty more years out of them, worth a try.

Nov 21, 2009 | 1997 Volkswagen Jetta

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