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How to check glow plugs - Cars & Trucks

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Remove glow plugs,then connect each one to 12volt supply.Make sure negitive goes to glow-plug body and the positive to live terminal,now you have a circuit feel the end of the plug it should be hot.CAUTION!!! very hot if it`s not it`s broke..Good-luck...

Posted on Jan 06, 2013

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Posted on Jan 02, 2017

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2.7tdi newish heat plugs,glow light stays on ,smokes on cranking ,won't start


the glow plug circuit may be faulty, check glow relay and timer function, or connection to glow plugs, the glow plugs may also be faulty, if all is well with them, then you may want to check the fuel injection pump it may have a worn hydraulic head. To start you can try some quick start fluid but disconnect the glow plugs first,

Feb 04, 2015 | 2005 Nissan Terrano 2.7

2 Answers

What is the code p0473 for a dodge sprinter van 2008


Error Code: P0404
Fault Location:
Exhaust Gas Recirculation (EGR) System - Range/Performance Problem
Causes:
-Hose leak/blockage.
-Wiring harness.
-Exhaust gas recirculation (EGR) valve/solenoid.
Error Code: P0473
Discription:
Exhaust Gas Pressure Sensor - High Input
Causes:
- Wiring short to positive.
- Exhaust gas pressure sensor (G450).
- Engine control module (ECM).
Error Code: P0674
Description:
Glow Plug Cylinder 4 Circuit - Circuit Malfunction
Causes:
-No Pre-Glow Period.
-Poor Cold Starting.
-Glow Plug Wiring faulty.
-Poor connection.
-Relay.
-Glow plug control module.
-Glow Plug faulty.
-Engine control module (ECM).
Solutions:
Check Glow Plug Wiring.
Check Glow Plug.
Error Code: P0675
Description:
Glow Plug Cylinder 5 Circuit - Circuit Malfunction
Causes:
-No Pre-Glow Period.
-Poor Cold Starting.
-Glow Plug Wiring faulty.
-Poor connection.
-Relay.
-Glow plug control module.
-Glow Plug faulty.
-Engine control module (ECM).
Solutions:
-Check Glow Plug Wiring.
-Check Glow Plug.

Sep 20, 2014 | 2008 Dodge Sprinter

1 Answer

Hiace starting problems


Is the battery in a good condition, it a diesel engine? If so the glow plugs would be the first point of call. Check for power at the glow plug main wire feed, if you have power there then a wiring fault can be ruled out. If not check your glow plug relay and associated wiring. If you have power, I think from memory its only 11 volts, remove the power balance rod that runs across the top of your glow plugs. Then remove the glow plugs and connect them across a battery hold the threaded body of the glow plugs and the negitive terminal and use a piece of wire to connect the small fine threaded end to the positive terminal on the battery. The glow plug should glow a hot bright red within a few seconds of being connected. If it doesnt it is faulty. 1 faulty glow plug puts strain on the other glow plugs. Id replace all 4 if any are faulty. I hope this helps.
tyl

Mar 18, 2014 | Toyota Cars & Trucks

1 Answer

Glow plug light flashing


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?

Dec 21, 2017 | Volkswagen Cars & Trucks

1 Answer

Engine code p0380


EOBD II Error Code: P0380
Fault Location:
Glow Plug/Heater Circuit Malfunction
Possible Cause:
1.No Pre-Glow Period.
2.Poor Cold Starting.
3.Wiring harness.
4. Glow plug relay.
6. Fuse.
7. Glow plugs.
8. Engine control module (ECM).
Possible Solutions:
Check Glow Plug Wiring.
Check Glow Plug(s).

Mar 19, 2013 | 2005 Toyota Yaris Verso

1 Answer

1992 F250 7.3 idi diesel glow plug relay has power to two large posts and one small post and the second small post pulses when activated. I checked ground to engine and seems to be gounded fine. Any ideas...


Have you checked the glow-plugs? On that system if one glow-plug is burnt up than it will not let the main relay in the controller to kick in.
Check all the glow-plugs make sure they are working.
The easiest way to check them is with a regular 12v test light.
Hook up the negitive end (aligator clip end ) to the battery + terminal and than with the other end of the test light ( pointed end ) touch each glow- plug connector tip ( with the glow-plugs harness connector removed ) and see if the test light lights up.
If the test light up--- glow-plug is good. If not than the glow-plug is bad--burnt out .

Feb 13, 2010 | 1992 Ford F250

1 Answer

Glow plugs flashing when engine is running


HI. This is an indication of a failing glow plug. It will be necessary to test each plug to isolate the issue, or run a diagnostic scan on the CPU. During the scan, you should be issued a code that will isolate the actual glow plug that is malfunctioning. If you insist on testing each plug, use my procedure below to assist. You can find the resistance specs in your operators manual.


A test light can be used to determine if the glow plugs are working.


1. With the test-light grounded, insert the test light probe into a glow-plug wire to check for continuity.

2. If the light comes on, check the other cylinders in the same manner. If the test light failed to light, check for continuity at the glow-plug relay.

3. If no power is present, check the control circuit of the glow plug relay.

4. If the control circuit is working, the relay may be defective (FYI, manufacturers may have the system fused and fusible links may be located throughout the system).

5. If the glow-plug circuit is working, the glow plugs themselves may be defective.

Checking glow-plug resistance:(Remove the plug for this test)

1. With an ohmmeter, connect one lead to the terminal and the other lead to the body.

2. Read the resistance and compare to specifications.

3. A visual inspection may also be necessary to check for excessive carbon buildup and physical damage to the tip.

4. A glow plug that has excessive carbon deposits on its tip can give the correct ohmmeter reading but still not work. Clean the tip with carbon cleaner.(DO NOT USE A BRUSH TIP CLEANER)

Jan 06, 2010 | Ford Focus Cars & Trucks

2 Answers

Engine turns will not fire up glow plug sign flashing


HI. Usually, when this light illuminates, it will signal that one, or more of the glow plugs are malfunctioning. I recommend to test all glow plugs, so that you may isolate the defective plug.

A test light can be used to determine if the glow plugs are working.


1. With the test-light grounded, insert the test light probe into a glow-plug wire to check for continuity.

2. If the light comes on, check the other cylinders in the same manner. If the test light failed to light, check for continuity at the glow-plug relay.

3. If no power is present, check the control circuit of the glow plug relay.

4. If the control circuit is working, the relay may be defective (FYI, manufacturers may have the system fused and fusible links may be located throughout the system).

5. If the glow-plug circuit is working, the glow plugs themselves may be defective.

Checking glow-plug resistance:(Remove the plug for this test)

1. With an ohmmeter, connect one lead to the terminal and the other lead to the body.

2. Read the resistance and compare to specifications.

3. A visual inspection may also be necessary to check for excessive carbon buildup and physical damage to the tip.

4. A glow plug that has excessive carbon deposits on its tip can give the correct ohmmeter reading but still not work. Clean the tip with carbon cleaner.(DO NOT USE A BRUSH TIP CLEANER)

Oct 22, 2009 | 2003 Jaguar X-Type

1 Answer

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

Feb 15, 2009 | 2002 Volkswagen Jetta TDI

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