Usually, you can tell the bad glow plugs, simply by removing the relay
cover, and the plug with the thicker wires, and touching each connector
in the plug with the multimeter set at Ohms, the other to a good ground.
My glow plug system stops working if 2 or more glow plugs are shot.
Rob
'85 300D
Garden Grove, CA
On 12/21/11 1:27 AM, diesel_mercedes@yahoogroups.com wrote:
> Re: Ontario CA PAP today/No start
> Posted by: "Lawrence Rhodes"primobassoon@sbcglobal.net looksee007
> Date: Tue Dec 20, 2011 7:40 am ((PST))
>
> You must test each glow plug. I measured a used but good plug and it registered
> .9 ohm. Take off the relay cover& pull the connector out to test or disconnect
> each one at the plug. Test with a multimeter. If the relay is connected you
> won't get a good test. All the glow plugs must be good to get the motor to
> start well. Lawrence Rhodes......
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