1985 HJ75 Pickup (3 Viewers)

[Gun Runner 5]

The bag is, the contents can be bought however.

Cool ...... I feel special now.

 

[cruiserdan]

I think of you as special.....

 

[Gun Runner 5]

I think of you as special.....

Well that makes you and my mother.

 

[Gun Runner 5]

******* Attention Electrical Gurus *******
Does this sound like a faulty voltage regulator? ......
The last of couple of days when I start my BJ74 the voltage gauge will only rise about halfway (just barely reaching the lower portion of the white arc) however after 60-90 seconds it will move up the top part of the white arc (normal position) and stay there. It only seems to do this on the first start of the day.
Thanks...

 

[elkaholic]

Forgive my ignorance, does the B engine have glow plugs or pre-heaters? It sounds like the reaction I see on my Cummins ISC when the grid heater cycles on cold starts. If that is what is happening, it is kinda weird that it is doing that in S GA in the summer!

 

[Gun Runner 5]

Forgive my ignorance, does the B engine have glow plugs or pre-heaters? It sounds like the reaction I see on my Cummins ISC when the grid heater cycles on cold starts. If that is what is happening, it is kinda weird that it is doing that in S GA in the summer!

13B-T ..... No glow plugs.

 

[elkaholic]

Like I said ... ignorance

 

[Gun Runner 5]

Like I said ... ignorance

If lack of ignorance was required on this forum, this thread or any other one started by me wouldn't exist.

 

[Gun Runner 5]

The other clue that I have electrical gremlins......
I have a cheap electrical fan plugged into my cigarette lighter and the fan speed noticeably increases as the voltage comes alive after a minute or so.

 

[Shes Mad]

The other clue that I have electrical gremlins......
I have a cheap electrical fan plugged into my cigarette lighter and the fan speed noticeably increases as the voltage comes alive after a minute or so.

It does sound like your glow screen may be cycling. unplug the sensor at the water outlet, and see it it changes anything

 

[cruiserdan]

Mine does the same thing. I do not think it is the screen, I think it is a normal function. Probably to protect the alternator from high currrent loads right off the bat. Needle deflection is more noticiable if the batteries are low IE the fridge running for a long time keeping the suds cold.

 

[Gun Runner 5]

Mine does the same thing. I do not think it is the screen, I think it is a normal function. Probably to protect the alternator from high currrent loads right off the bat. Needle deflection is more noticiable if the batteries are low IE the fridge running for a long time keeping the suds cold.

When I return to the Confederacy I plan to have the regulator tested just to make sure there is not an impending problem.

 

[cruiserdan]

I await the results.

 

[cruiserdan]

I can't find a direct reference to any "charging delay" in the engine manual or the body/chassis manual. However I did find a reference to "after-heating time" that indicates the "after-heating time" to be ~70 seconds. The book specifically states "Since power consumption is high, perform this check as few times as possible".

My guess is the alternator is somehow taken "off-line" during this ~70 second "high-load" period to prevent damage to the charging system.

Further more it appears that a coolant temperature switch of some sort is in play and that would explain why the alternator appears to be on-line from the get-go on a "warm start".

I also bet that if one were to "fix the delay problem" he would probably fry the alternator, voltage regulator, glow relays and other insignificant bits on the first really cold start.

 

[elkaholic]

Dan - As a point of reference, that is how the grid heater on the Cummins ISC in my RV works. Unless it is really hot on a cold start (>95F or so), the grid heater cycles on and off for the first 90 seconds or so of idling time. The digital voltage gauge will read 14.0 or so when it is off and as low as 11.5 when the grid is energized.

Not a Toyota reference, but a diesel engine reference that is probably worth less than what a gallon of diesel costs ....

 

[cruiserdan]

My 89 Dodge/Cummins 6BT also pulls huge current when the grid cycles but the alternator is always in the loop. Which is almost certainly why it kept frying stock ammeters until I quit replacing them...

 

[cruiserdan]

Interesting "test results".......

It HAS GOT TO BE intentional.

Mine has been sitting a few days and I did a start-up test when I got home this evening. It took 69.35 seconds from engine start-up to when the voltmeter "reacted". At the exact time the voltmeter went "live" there was an audible click from the solenoid pack just in front of the forward battery. That pack is the glow screen relay assembly.
After test one I went on a grocery run (literally.. ) and on "hot" re-start the meter reacted instantly.

 

[Gun Runner 5]

Interesting "test results".......

It HAS GOT TO BE intentional.

Mine has been sitting a few days and I did a start-up test when I got home this evening. It took 69.35 seconds from engine start-up to when the voltmeter "reacted". At the exact time the voltmeter went "live" there was an audible click from the solenoid pack just in front of the forward battery. That pack is the glow screen relay assembly.
After test one I went on a grocery run (literally.. ) and on "hot" re-start the meter reacted instantly.

Perhaps I'm chasing a problem that doesn't exist. Thanks for the information.

 

[Gun Runner 5]

The tire cover lives again. ( slightly wet due to a rain shower ).
Thanks, Alex

 

[Chester]

You let rain get on your truck?