Question about 1994 Mitsubishi Montero
My glow rail would come on for a very short time, then turn off (less than 1 second).
Replaced the control wire for the glow relay, with a test lead from battery to relay control terminal - relay was working fine (relay is between batteries).
Checked the engine temperature sensor (located on top of the housing where the top radiator hose attaches to the engine).
Take out and test in a pot of water (need a 19mm deep socket to remove).
At 0 deg C should be 8.6K ohms
At 20 deg C should be 3.25K ohms
At 40 deg C should be 1.5 K ohms
At 80 deg C should be 300 ohms
I replaced the temperature sensor with a 8.2K ohm resistor (engine cold).
Then tried with a 1.2K ohm resistor (engine hot).
Each time I tested the glow rail at the relay (with a multimeter) it would turn off after about 12-14 seconds, which is normal, to protect the glow plugs and battery drain (they come on again when engine is starting).
When I put the temperature sensor back in, the glow rail was working fine again - only thing I can think of is that the contact between the sensor and the plug, may have had a oxide formed and caused a high resistance or open circuit, indicating to the glow controller that the engine was hot and did not need glow activation.
So try taking the plug off the temperature sensor, and reattaching it again it might be all it needs, to clean its contacts.
Posted on Feb 06, 2010
Check the timer
Posted on Feb 01, 2010
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Posted on Jan 02, 2017
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