No power to glow plugs on my vw caddy 1.9 tdi

SOURCE: 03 VW Jetta TDI

I realize it's a little late in this game but I had a similar problem with my 2003 TDI. Sometimes it just wouldn't start, Dealer came and picked it up once to replace the battery under warranty and did all sorts of diagnostics to no avail. My brother suggested the ignition switch, so I watched it for several weeks and sure enough, new switch under warranty, problem gone for 4 years now.

SOURCE: 2000 vw jetta tdi glow plug problem ?

Ok , ok. Give me some more information and we'll solve this. We're talking about a jetta TDI 2000 with an ALH engine code I figure.
#1 Do you have an faults recorded in the ECM like a check engine.
#2 Are you using synthetic oil 5W40 preferably Castrol?
#3 How old is your fuel filter?

steve morris

• 1675 Answers
• Posted on Jan 30, 2010

SOURCE: How do i replace my VW SHARAN 02 glow plug relay.

the glow plug relay is a little black box normally located in the fues box, the relay regulates power to the glow plugs, if the relay is not functioning correctly the plugs will not heat enough or, you will have to allow a longer time to let them heat up, it acts like a switch as such, when you turn on your ignition it switches over to make a contact inside, which inturn starts the heating prosess of the glow plugs when they are at the correct tempreture or the onbored computer detects they are it then switches back , without it , say just using a fuse instead, your glowplugs will just get hotter and hotter till they melted, and no you dont have to change the glow plugs hope this helps, ime not good at explaining stuff in writing lol

Testimonial: "Good advice, I understand the concept of what i need to replace, now i can sort the problem out myself. CHEERZ u guys save us ppl money and time. "

SOURCE: 1992 F250 7.3 idi diesel glow plug relay has power

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 .

Testimonial: "Thanks, I had one out and now the truck starts right up. "

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. [email protected]