Glow Plug Indicator Light Not Working

GregFrench · 09-23-07, 08:30 AM

1981 HJ47 w/ 2H
It has always worked, but now when I turn the key backwards, I hear the relay but the little indicator coul never turns red.
I am pretty sure the plugs are working, though, because it starts right up every time I do it, but doesn't when I don't.

Is there a fuse or something to this?

Joe Egolf · 09-23-07, 09:38 AM

I have the same issue with my 3b ,bj42

lostmarbles · 09-23-07, 04:14 PM

The wiring diagram for my BJ40 shows the glow plug indicator light is operated by a different set of contacts within the glow plug relay. But upstream of that - they both (glow plugs and the indicator) get their power from the same source. (So a fuse can't be the problem if yours is wired like mine.) This points to the fault must be between the glow plug relay and the indicator itself.

toynut · 09-24-07, 07:45 AM

this may seam overly simple , but what about the light ?

Tapage · 09-24-07, 08:47 AM

Did you already check the light bulb . ?

Greg_B · 09-24-07, 11:23 AM

Are you sure it's a light? My 1981 BJ42 uses a wire coil behind a screen. It is in line with the glows, offers resistance...lights up in conjunction with the glow plugs.

Have someone use a multi-meter on the glowplug busbar to ensure they are getting current. If they are, look to the element being burnt out. The entire unit can be pulled from the dash, and I think you can then access to check the coil.

User error: I fried the coil when I was doing the frame off on the BJ42, and was able to order a new one from Toyota. That was in 1999/2000 though.

__________________________________________________ ___________

However...on my 1983 BJ60 the glow indicator is a light, and is on it's own circuit in the fuse panel. If yours is a light, check that fuse.

hth's

gb

GregFrench · 09-28-07, 01:51 PM

Mine is the coil type. No biggie, as I know the plugs are working. It's just that I have gotten used to teh comforting, warm, orange glow in the morning.

09-23-07, 08:30 AM	#1
GregFrench IH8MUD Regular Join Date: May 2004 Location: Myrtle Beach, SC Posts: 450	Glow Plug Indicator Light Not Working 1981 HJ47 w/ 2H It has always worked, but now when I turn the key backwards, I hear the relay but the little indicator coul never turns red. I am pretty sure the plugs are working, though, because it starts right up every time I do it, but doesn't when I don't. Is there a fuse or something to this? __________________ VEGGIE-Powered 1981 HJ-47

09-24-07, 07:45 AM	#4
toynut IH8MUD Addict Join Date: Dec 2005 Location: Port Moody B.C. Posts: 630	this may seam overly simple , but what about the light ? __________________ 1984 red Bj60 sold 1984 brown Bj60 sold 1985 gray Bj 60 sold 1988 FJ 62 My current Ride Wanted Fj 40 project .

09-24-07, 11:23 AM	#6
Greg_B IH8MUD Lifer Join Date: Mar 2002 TLCA# 7091 Posts: 3,015	Are you sure it's a light? My 1981 BJ42 uses a wire coil behind a screen. It is in line with the glows, offers resistance...lights up in conjunction with the glow plugs. Have someone use a multi-meter on the glowplug busbar to ensure they are getting current. If they are, look to the element being burnt out. The entire unit can be pulled from the dash, and I think you can then access to check the coil. User error: I fried the coil when I was doing the frame off on the BJ42, and was able to order a new one from Toyota. That was in 1999/2000 though. __________________________________________________ ___________ However...on my 1983 BJ60 the glow indicator is a light, and is on it's own circuit in the fuse panel. If yours is a light, check that fuse. hth's gb __________________ WANT A TOYOTA DIESEL ENGINE? Join the Import Vehicle Owners Association of Canada: Fight for what is right Canadian Vehicle Importers and Suppliers: Join the CAVI TLCA#7091

09-28-07, 01:51 PM	#7
GregFrench IH8MUD Regular Join Date: May 2004 Location: Myrtle Beach, SC Posts: 450	Mine is the coil type. No biggie, as I know the plugs are working. It's just that I have gotten used to teh comforting, warm, orange glow in the morning. __________________ VEGGIE-Powered 1981 HJ-47

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09-23-07, 09:38 AM	#2
Joe Egolf IH8MUD Regular Join Date: Jun 2006 Location: W.Suffield Ct Posts: 437	I have the same issue with my 3b ,bj42

09-23-07, 04:14 PM	#3
lostmarbles IH8MUD Lifer Join Date: Sep 2007 Location: New Zealand (The other side of the world to most of ya!!!) Posts: 1,824	The wiring diagram for my BJ40 shows the glow plug indicator light is operated by a different set of contacts within the glow plug relay. But upstream of that - they both (glow plugs and the indicator) get their power from the same source. (So a fuse can't be the problem if yours is wired like mine.) This points to the fault must be between the glow plug relay and the indicator itself.