glow plug problems after $1000 spent

[kiwijase]

yep,thats where i connected it Rodney,to the engine block.
Yes mine is 24volts

[Yendor]

At the glow plug relay there is a large White wire with a Red trace on it, measure the voltage at this wire when the glow plugs are on.

[kiwijase]

ok,at the relay on the wire you mentioned,with the key ON,im gettin 11.66vlts.I think i have two glow relays by the look of things Rodney,would that be of any help?
Thanks again

[Yendor]

How's the battery in your multimeter? try putting your multimeter across one battery, what does it read?

[kiwijase]

one battery reads 12.2 the other reads 12.4. Theyre brand new NS70 units.The muntimeter is fairly new and has only been used a few times,but it was only $15 from dick smith.

[Yendor]

At the other relay there should be a large White wire with a Green trace, measure the voltage at this wire when the glow plugs are on.

[Yendor]

At the same relay there should be a small Green wire with a White trace, measure the voltage when the glow plugs are on (just turn ignition off and on a few times).

There should also be a large White wire this should have 24 volts???

[kiwijase]

the other large white wire on the other relay doesnt have any coloured trace,but it has 12v with key off,when turned to the on position the meter drops to 11.4v

[kiwijase]

the green wire with the white trace(small wire on same relay) reads 11.5 when the key is turned on,stays the same after relays have clicked off too.

[Yendor]

I have heard there are some Y60 that are 24 volt start and 12 volt running but I wouldn't think there would be any in NZ.

I don't have a wiring diagram that suits your vehicle and it seems the one for the GU is also too different.

I'm not sure which way to proceed, I would hate to tell you the wrong thing because I don't have the correct information on your vehicle.

I still think it is a problem with the timer circuit. Here's a couple of other thing you can check:

I have attached a photo of how to test the relays and the temp. sender (I think the values should be correct).

In the driver side kick panel should be the control unit for the glow plugs, remove the cover and inspect for any signs of water damage.

If you have no luck with this, I still think we should be able to put a manual momentary push button switch in the dash.