new style glow plug controller testing?

[blazinzuk]

I can't find out how to test the new style glow plug control this is not the round one. This one appears to be after 86 or so.

Pretty sure glow plugs aren't working light comes on but it starts awful.

I did the simple test on the glow plugs and they all but one appear to be working the one not working I could not get out when I replaced all the other ones. Pretty sure the temp switch works as my light does not come on after I have driven it.

I just wanna make sure it's the controller. Before I drop 80 bucks.

I have zero interest in doing a manual switch.

 

[blazinzuk]

Hello is anybody out there just nod if you can hear me

 

[livid4dirt]

No input to your testing adventures, but a "nod" for sure!

 

[blazinzuk]

At least I know someone is reading this although I still can't find an answer on the Internet

 

[campfire]

At least I know someone is reading this although I still can't find an answer on the Internet

I'm reading also, but I have no insight on this issue. I'm not particularly interested in running the slow warmup cycle of the stock controller. Newer plugs are nice...

 

[82355]

I got nothing. Both the 6.2's I am fiddling with right now have push buttons.

Martin

 

[POORBOYK5]

Print
ProDemand
1987 Chevrolet Blazer 6.2L Eng V10
ELECTRICAL SYSTEMS

REQUESTED INFORMATION


ELECTRICAL SYSTEM DIAGNOSIS

Perform this diagnostic procedure if engine does not start when cold. "GLOW PLUGS" light may or may not come on. Check fuel system to ensure it is okay. Ensure battery voltage is 12.4 volts or more with ignition switch off. Check that cranking speed is at least 100 RPM.

Connect 12-volt test light to ground. Place test light probe on battery stud (single Red wire) on glow plug controller. If test light glows, go to next step. If test light does not glow, locate and repair open circuit between battery and glow plug controller.
With ignition off, place test light probe on glow plug feed stud (2 Orange or Red wires) on glow plug controller. If test light glows, relay contacts are shorted. Replace glow plug controller and all glow plugs. If test light does not glow, go to next step.
Disconnect harness from all glow plugs. Connect test light to battery (12-volt source) and touch each glow plug terminal. Test light should glow. Replace glow plug(s) if light does not glow. Connect all glow plugs before going on to next step.
With ignition switch in "RUN" position, connect 12-volt test light to ground. Remove controller connector and check voltage (from ignition switch) at terminal "D" of harness connector.
If test light does not glow, repair open circuit from ignition switch to controller. If test light glows, connect test light to battery (12-volt source) and check for ground at terminal "E" of harness connector.
If test light does not glow, repair open in ground wire to terminal "E" of connector. If test light glows, connect test light to battery (12-volt source) and check terminal "C" of harness connector.
If test light glows, replace glow plug controller. If test light does not glow, remove temperature inhibit switch connector and check for continuity through switch.
Switch should be open above 125°F (52°C). If continuity exists, repair open circuit in harness, between glow plugs and terminal "C" of harness connector. If no continuity exists, replace inhibit switch.
Fig 1: Engine Wiring System Diagram
G12593

 

[blazinzuk]

You sir rock thanks much