Check Glow Plug System Chris Chemidl In Turn the ignition key to the glow position. if the test light lights and stays on for:quick glow system = 15 seconds (min.) normal glow system = 90 seconds (min.) test the glow plugs. if the test light does not light, first test the glow plug circuit, then the glow plugs. if the test light lights, but the minimum glow time is not reached. Glow plugs are installed in the diesel engine as a preheating provision to aid in cold starting. two types of glow plug systems are used: 1) quick glow system and 2) normal glow system. the colder the engine the longer the pre heat time. the glow plug relay performs the following functions: pre glow — pre heating time.
Check Glow Plug System Chris Chemidl In A leaky diode in the alternator stops the glow plugs from working. pin #2 not used in 82. pin #3 blue wire gets battery voltage when ign on. pin #4 orange wire and dark green wire go to glow plug relay. at relay they are twin red wires. pin #5 black wire goes to ground and pin #6. How to check glow plug system. to check the glow plug relay (gpr) · be sure the engine is cold, so that the pcm will tell the gpr to turn on. if the engine is hot, you won’t have as much time to check. · locate the gpr – its behind the fuel filter on top of the engine, a little bit toward the passenger side of the valley. Remove any covers that may be obstructing access to the glow plugs, and use the flashlight for additional illumination if necessary. step 3: disconnect the glow plug wires. once all of the glow plugs have been located, disconnect any wires or caps attached to them. step 4: touch the negative terminal. To do a quick test of your glow plug system locate the glow plug relay under the engine cover (plastic hood looking thing on top of the fuel filter, draw a line from center of filter to right headlight and the relay is about 6” from the filter housing under that line). when the truck is having a hard time starting use a jumper cable and jump.
Check Glow Plug System Chris Chemidl In Remove any covers that may be obstructing access to the glow plugs, and use the flashlight for additional illumination if necessary. step 3: disconnect the glow plug wires. once all of the glow plugs have been located, disconnect any wires or caps attached to them. step 4: touch the negative terminal. To do a quick test of your glow plug system locate the glow plug relay under the engine cover (plastic hood looking thing on top of the fuel filter, draw a line from center of filter to right headlight and the relay is about 6” from the filter housing under that line). when the truck is having a hard time starting use a jumper cable and jump. You can ohm check the gp's without pulling the valve covers. the connectors are arranged as such: gicig. g = glow plug. i = injector. c = injector common ground. to test the glow plug measure ohms between each g pin and a good ground. should be between 0.2 and 2 ohms. open (no resistance, 0 ohms) means a bad glow plug. Hook a bungee cord to the manual fuel shutoff arm on the injection pump to hold it in the off position. crank the engine for approx 20 seconds to clear the cylinders through the glow plug holes. re test your compression. if the fuel shut off in not off, your injectors are spraying fuel into the cylinder while doing your compression test. thanks.
Comments are closed.