Starter relay for Glow plug problem.

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Joined
Aug 24, 2013
Threads
130
Messages
749
Location
Atlanta
I have a 96 Fzj80 and I just swapped in a 6.2 diesel. I am at the point where I am just running it in the garage to work out bugs. Finding lots: I installed a ford starter relay so I can manually heat my glow plugs. After running the engine for a bit I shut it off and started working on bleeding my brakes. When I went to start it again about 20 minutes later the batteries were dead. Brand new batteries. So I started hunting for where the draw is. I touched the relay and it was red hot. I found that power was still going through it and heating the plugs.

I am having a hard time believing that I got a bad relay but that is the only thing I can come up with. I've checked the wiring and its correct. I have a large gauge wire going straight from the battery to the relay like 4 gauge. Could that be causing it?

Any ideas?
 
I and many others, use a Ford type relay for manual glow plug control and it works great.

There are many types of relays and ways to wire them. Are you sure you have the right type and wired it for that type? Is the control, ie, momentary button working correctly? Could there be a short that's keeping the relay energized?

The big wire is fine. Bad relay is possible, but wiring and switch are my first guess.

If you killed a pair of batteries, you likely cooked your glow plugs and relay also. 20 minutes of full power would be hard in the GP's!

Doug
 
I am using a BWD S63P relay. That one was recommended on the wiring diagram for my application I found somewhere.
When I push the control button I still hear the click so I thought it was working right but I guess it could still be allowing enough power through to close the relay enough.
I am worried about the GP's also. I'm really hoping they are self timing plugs like the PO of the engine said.

Thank you for your response.
 
I think I'll get a new relay and hook up the battery line and the line out to the glow plugs first and test for power getting through. And then hook up the control wire and test again. That should reveal the problem.
I hope.
 
I think I'll get a new relay and hook up the battery line and the line out to the glow plugs first and test for power getting through. And then hook up the control wire and test again. That should reveal the problem.
I hope.

Sounds like a good plan, but why don't you do this test with the present relay?

Rudi
 
Sounds like a good plan, but why don't you do this test with the present relay?

Rudi


I did do this test with the present relay. Power going through with the control wire disconnected.
I ended up returning it as defective and got a new one. Back running again. Glow plugs seem to be fine amazingly.
 
I had a Ford starter relay weld closed on me just like you did. They are not rated for that much continual amperage. I spent the money on a much heavier duty relay from Amazon rated at something 250-400 continuous amps ( I can't remember the exact number). It's tempting to use a $20 vs a $75 relay but it only takes getting stuck once with dead batteries to change the cost effectiveness.
 
I have a toyota hilux LN106-3L engine,fitted new alternator with 6 pin ext.regulator but battery overcharging,..any help.

Nkoxz
 

Users who are viewing this thread

Back
Top Bottom