Dead Deisel-Battery/Alt?
Elder User
Joined: Jul 2007
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From: Lawrenceburg, TN
Originally Posted by c00nhunterjoe
this time of year i'd say the gauge should pop up to normal after about 10 seconds
its been between 95-105 deg arround here and it still takes a llitle while (45 sec to 1 min) for the volt guage in my dash to show full charge
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Postmaster
Joined: Jun 2007
Posts: 2,795
Likes: 1
From: Rogue River, OR
It's about 104 degrees amd I don't have any help here is what I have done.
My relay is a little different that the one in the pix. Mine sits upright whith two (2) large terminals on the top. One of these terminals is always "Hot"
the other has a "Yoke" attached to it and to each of the yokes ears there are two (2) wires each that as of this writing, I assume run to the glow plugs on each side of the engine.
There are two (2) other smaller terminals that I assume one of which comes from the ignition and the other???????
So....what I have learned so far is that when I turn on the ignition the terminal with the yoke becomes hot and it stays hot. In my past experiences with relays is that this is not right. One would think that if the power to the relay does not open at some predetermined time then the end result would be: "Burned Out Glow Plugs"
Altho I am not in a position to hear the relay click it is obvious that it is making a conection.
If I recall, is there not a unit, a PCM that controls the duration of the GPR? Where is this little guy located and is there a test proceedure for it?
Roger
My relay is a little different that the one in the pix. Mine sits upright whith two (2) large terminals on the top. One of these terminals is always "Hot"
the other has a "Yoke" attached to it and to each of the yokes ears there are two (2) wires each that as of this writing, I assume run to the glow plugs on each side of the engine.
There are two (2) other smaller terminals that I assume one of which comes from the ignition and the other???????
So....what I have learned so far is that when I turn on the ignition the terminal with the yoke becomes hot and it stays hot. In my past experiences with relays is that this is not right. One would think that if the power to the relay does not open at some predetermined time then the end result would be: "Burned Out Glow Plugs"
Altho I am not in a position to hear the relay click it is obvious that it is making a conection.
If I recall, is there not a unit, a PCM that controls the duration of the GPR? Where is this little guy located and is there a test proceedure for it?
Roger
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
yours looks different because tj has a different aftermarket styled relay, yours is stock. it should not stay hot for more than 2.5 minutes, start the truck as normal with the test light in place, it should go out, if it stays on constantly then it is sticking but i would be willing to bet that it will go out. yes the pcm controls relay on\off and on time, it bases that time on engine oil temp, intake air temp. it is located behind the e-brake, you can see the connector if you look at the firewall next to the brake booster, 104 pin rectangular connector
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Postmaster
Joined: Jun 2007
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From: Rogue River, OR
Originally Posted by c00nhunterjoe
yours looks different because tj has a different aftermarket styled relay, yours is stock. it should not stay hot for more than 2.5 minutes, start the truck as normal with the test light in place, it should go out, if it stays on constantly then it is sticking but i would be willing to bet that it will go out. yes the pcm controls relay on\off and on time, it bases that time on engine oil temp, intake air temp. it is located behind the e-brake, you can see the connector if you look at the firewall next to the brake booster, 104 pin rectangular connector
21/2 minute seems like a long time. Maybe I'm just being overly protective, I just don't want to burn anything up.
Well, here goes.
Roger
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Postmaster
Joined: Jun 2007
Posts: 2,795
Likes: 1
From: Rogue River, OR
Well Joe, ya did it again. That relay shut off between 40-45 seconds. I have tried it five (5) times. Damn, I feel like the little boy who cried wolf. I probably never had a problem in the first place, I probably just never noticed the volt meter displaying that lag before. But I still have to keep a close watch to ascertain why I ended up with dead batteries after my vacation run.
I for one am grateful that you and all of the others are out there, what a fascinating group of experiance that is willing to share.
Thank you,
Roger
I for one am grateful that you and all of the others are out there, what a fascinating group of experiance that is willing to share.
Thank you,
Roger
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Joined: Apr 2004
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From: Silver Lake Dunes, MI
In our trucks the alternator will not charge for the first 40 seconds whether the glow plugs are hot or not. its controlled by the PCM and its programmed to not charge for the first 40 seconds after start-up. Everything is good to go in your truck.
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
Originally Posted by tjbeggs
In our trucks the alternator will not charge for the first 40 seconds whether the glow plugs are hot or not. its controlled by the PCM and its programmed to not charge for the first 40 seconds after start-up. Everything is good to go in your truck.
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