Question about Cars & Trucks
No voltage to relay
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Glow PLugs and Relays
The glow plug relays are located on the right front shock tower. Remove the cover and you will see two relays If I remember I think they are round, but not sure.
Please let me know how you make out and if there is anything else that I might be able to help you with.
Posted on Sep 17, 2008
Have you checked all of your vacuum hoses for leaks? Any vacuum leak, even intake manifold or throttle body gasket, will cause an engine stall right after starting. Likewise with a fuel pressure problem. If you aren't getting voltage, maybe whatever switch starts your glow plug cycle(either turning ignition on or opening driver door, depending on model) is defective, or any of the wiring of the circuit. It's a cheaper guess.
Posted on Feb 26, 2009
Our problem was to establish if we had a line resistance from the fan relay to the thermo switch or an intermittent earth connection. Neither was the answer.
We managed to locate a circuit diagram off the web and discovered that the fan relay is controlled by the ECM. The ECM gets data from the thermo switch and that is a 5 volt circuit.
We found a guy about 2 miles from where we are in New Zealand who has an electronics workshop who has had this happen before and repairs ECM's for a living. He will get it monday to do that.
THe original problem was that the two hoses that come from the block to the heater blew simultaeniously. Couple of plastic connectors broke. Fixed those and tested all fine and two days later popped the pressure cap. At this point found the radiator fans had been intermittent and finally failed completely. Cant find any other damage so will thow in a new thermo stat an a repaired ECM anfd go from there.
Posted on Jun 20, 2009
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