Yet another glow plug thread

[JackG]

Where, actually do you place the leads to ohm out the GP's?
I know one lead will go to one of the five pins in the relay.
Does the other go to ground? Pos? or somewhere else?

[TheDon]

negative terminal on the battery

if you dont have a long enough cable just use some copper wire

[tangofox007]

Originally Posted by TheDon

negative terminal on the battery

if you dont have a long enough cable just use some copper wire

Wouldn't it be easier to find a ground a bit closer to the glow plug relay?

[TheDon]

I was told you have to use the negative terminal on the battery

Originally Posted by dieselgiant

Take the negative terminal of your multimeter and connect it to the battery negative. Then take your positive probe and test each socket in the connector. As can be seen here the number 1 cylinder wire and glow plug read .9ohms or .6 ohms without the meter resistance. That is ok. Remember, at this point we are testing the glow plug and the wire to the plug.

[tangofox007]

Originally Posted by TheDon

I was told you have to use the negative terminal on the battery

If the objective is to just test glow plugs, any convenient ground will do.

[whunter]

The wire harness must NOT be connected to the glow plug relay during testing.

When testing OHMS = resistance, NEVER make contact with a live circuit or power source = it will blow the meter or internal fuse.

Picture attached to make this clear.






Have a great day.

[F18]

Any good ground will do.......any bare metal or screw along the fire wall/fender well will be ok.
If it had to be the negative battery terminal all of us now with W210s would have a dilemma because the battery is under the back seat. Just running a length of wire that distance has resistance.