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Glow plug light flashing

My 1999 vw 1.9 sdi will not start there is no glow plug light any more. checked ALL the fuses replaced the glow plug relay. Still no luck. Hot wired the fuel pumps directly from the battery and got the car started straight away, but when it runs, the glow pug light flashes. Any idea why the car will not start?

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  • Expert
  • 85 Answers

The glow plug are used to heat the fuel on start up only, as a diesel uses compression instead of a spark (from the spark plug) have you try checking the connection on the glow plug, or changing the glow plugs themselves?

Posted on Dec 21, 2017

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6ya6ya

6ya staff

  • 2 Answers

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Posted on Jan 02, 2017

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John McAuley

  • 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

Dudeman321

  • 233 Answers

SOURCE: No fuel or power to fuel pump.

If the relay is not getting ground signal to turn on then it sounds like a problem with the ECU this is fed from there. Commonly dry solder joints inside the ECU can cause this problem, they have a tendency to crack around the transistors and heavier load components and also components that are subject to mechanical vibration. He said that the fuel pump relay is located in the kick panel and the ECU is next to this. Id take out the ECU and remove the main circuit board and examine for dry solder joints. If you don't know what they look like its somthing like this http://www.tegger.com/hondafaq/mainrelayoperation/dry-joint_small.jpg

Hope this helps

Posted on May 08, 2009

Anonymous

  • 1 Answer

SOURCE: no spark no fuel no start! replaced and checked

funny thing is I have a 2002 GTI with the exact same problem. have spent the last three days at work trying to figure things out.. best of luckn email me if you figure anything out. Beattie411@gmail.com

Posted on Mar 19, 2010

Dave Lester

  • 1 Answer

SOURCE: VW Passat TDI turns but won't start.

99 vw passat 1.9tdi was driving sound but just died just turns but wont fire up

Posted on May 01, 2011

JCham

  • 3 Answers

SOURCE: 1986 Accord - fuel pump relay problem - HELP!

relay is under dash on driver side behind cruise control box. You tube has a demonstration on there for 92 accord.

Posted on Mar 10, 2012

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I bought a van 2003 Mercedes mb140 diesel. Is always gone and Also the mechanic gave me the ok. Then i wanted to sue but the light for the engineering start didn't turn on anymore so the engine didn't...


check the glow plug relay / and fuse. if thats ok then you will need a meter on the glow plug wire to see if there is any resistance on the glow plug its self. if the relay is at fault just change it. glow plug has no resistance then it needs changing. if the fuse has blown check the wire loom for the glow plug wires as they can get hot and earth to the engine.

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1983 Chevy Silverado, Glow plug light will not come on, Truck will turn over but not start, fuse panel has no blown fuses, I suspect the Glow Plug Relat but I don't know how to verify it is bad.


With most relays, you have 4 wires. One is power to the component the relay controls, one is a ground to the relay magnet, one is power to the magnet, and the fourth goes to the component, in this case the glow plugs. The ground usually comes from the computer.
With the key on you should have power to two terminals and you would jumper the hot terminal to the glow plug terminal. Or use a test light or meter to check for power on the glow plug circuit.

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Tried to start 2004 f250 with out glowplugs now it wont start. checked fuse still wont start


glow plug light and glow plug are not on same system
check at gow plug conection (top of valve cover both side
follow from relay front valve vover right side silver box)
power 12 volts on all 4 wires in both conector left and right
if not replace relay if 12 volts relay ok (test light clip on ground)
then check glow plug (test light clip on positive ) touch wires going
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if all seems ok look at the oil injection system most common
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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.

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No glows plugs on a vw passat from cold


I have an older VW and it has a fuse(not a normal looking fuse) for the glow plugs. Start at the glow plug wire and follow it back to Hopefully the fuse check for voltage on both sides, sometimes the fuse will look good but it is not.

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I have a 1997 ford F350 WITH A 7.3L DIESEL, it turns over but will not start. My wail to start light or other indicator lights do not come on when I turn on the key.


The first thing to do is locate the owner manual.

Look for the glow plug relay MAIN FUSE location.

The glow plug portion of your van is not working.

This difficulty scale from 1 to 10 is a 9.

You will need a DVM and tool undo the cables to each glow plugs.

It's a 1 to 2 hours troubleshooting job.

I'm going to fire off a quick list

====
Check / replace blown glow plug relay main fuse
====

Disconnect each center nut of the glow plug wire. PLEASE CHECK ONE AT A TIME.

Read the resistance between the center of the glow plug and the metal base of the plug.

Please take good note on each glow plug resistance reading.

MAKE SURE all cables are put back and tighten properly.

Compare the resistance on all cylinders.

OPEN/high resistance is bad glow plug.

In general 3 ohm or less is OK.

You should buy one and use its value as baseline.

===

Glow plug relay can be bad.

You will need the VOM and a friend to turn the key.

Check the voltage to each glow plugs. It should be 12.6-13.6 volt.

Be careful,the plugs will get HOT.

Compare the voltage on each cylinders.

====
So the problem can be combination of

glow plug relay

glow plug relay main fuse

glow plugs

ignition switch is unlikely but I'm going to list it anyway.

Once again,this is a difficult and time consuming job. I will ask a friend to help out,

Good luck.


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Yes you have a defective glow plug relay if you have your owners manual you can find it and replace it, the unit also has a timer on it, if you don't have a book look for the glow plugs and follow the wires from the glow plugs to where they terminate there you will find the relay unit and replace it, to test the glow plugs you remove the wires and test each plug by pulling off the wire and with a cheep ohm meter touch one end to the glow plug and one end to ground if it swings almost al the way over it is ok, if it dos not move then that glow plug is bad. if you find 2 or more bad then replace them all, and if a glow plug has shorted and caused this problem you will have to replace the glow plug relay. Good luck.

Jun 19, 2009 | 2003 Volkswagen Passat

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

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1 Answer

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.

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