bellarmine
- Jun 28, 2022
- 6
- Joined
- Jun 28, 2022
- Messages
- 6
Wow, those are quite different voltages! I did first check the voltages quickly in the truck with the control head plugged in, then since there seemed no difference I checked them in detail on my workbench. I'll double check tomorrow plugged into the control head again, and let you know if they're different.
To confirm, with the pins I assume you are starting at the Left side 12V pin and working over to the Right, alternating top and bottom rows back and forth? (from Left: top 1, bot 2, top 3, bot 4, top 5 etc.......). Like this?
Mine Off :: 1-12.6, 2- 0, 3- 0.2, 4- 0.6, 5-3.2, 6- 0, 7- 0, 8-4.9, 9-11.9, 10-5.0, 11- 0
Yours Off: 1-12.5, 2-12.5, 3-12.5, 4-12.5, 5-7.3, 6-12.5, 7-12.5, 8-7.4, 9- 0.6, 10-7.4, 11-12.5
Yours On: 1-12.4, 2- 4.3, 3- 2.3, 4- 7.4, 5-7.2, 6-12.4, 7-12.4, 8-7.3, 9- 0.6, 10-7.3, 11- 7.3
You have a good point about boosting the truck / voltage transients. I probably boosted the truck at some point after finding my scrapyard CDM, I was always changing batteries, connecting other booster batteries, boosting other vehicles, so lots of nice sparks there. My Dad was saying the same thing as you, probably not designed well enough for voltage spikes. You would think the GM engineers would keep that in mind, but I guess this was 'new' in the 80s-90s, so not done well enough.........
Yes, my regulator also says 44222 on it. You've managed to find an equivalent of some sort? I can't find any specs on these. That would be great if you tried one of your similar regulators to see what happens.
Another idea. Do you have a pinout? My Dad was saying if I could figure what voltages are needed, I could just supply 5V to the board and see if it functions, then just replace the regulator IC with separate regulator chips for the different voltages.
Thanks once again, this is getting interesting. Bellarmine
To confirm, with the pins I assume you are starting at the Left side 12V pin and working over to the Right, alternating top and bottom rows back and forth? (from Left: top 1, bot 2, top 3, bot 4, top 5 etc.......). Like this?
Mine Off :: 1-12.6, 2- 0, 3- 0.2, 4- 0.6, 5-3.2, 6- 0, 7- 0, 8-4.9, 9-11.9, 10-5.0, 11- 0
Yours Off: 1-12.5, 2-12.5, 3-12.5, 4-12.5, 5-7.3, 6-12.5, 7-12.5, 8-7.4, 9- 0.6, 10-7.4, 11-12.5
Yours On: 1-12.4, 2- 4.3, 3- 2.3, 4- 7.4, 5-7.2, 6-12.4, 7-12.4, 8-7.3, 9- 0.6, 10-7.3, 11- 7.3
You have a good point about boosting the truck / voltage transients. I probably boosted the truck at some point after finding my scrapyard CDM, I was always changing batteries, connecting other booster batteries, boosting other vehicles, so lots of nice sparks there. My Dad was saying the same thing as you, probably not designed well enough for voltage spikes. You would think the GM engineers would keep that in mind, but I guess this was 'new' in the 80s-90s, so not done well enough.........
Yes, my regulator also says 44222 on it. You've managed to find an equivalent of some sort? I can't find any specs on these. That would be great if you tried one of your similar regulators to see what happens.
Another idea. Do you have a pinout? My Dad was saying if I could figure what voltages are needed, I could just supply 5V to the board and see if it functions, then just replace the regulator IC with separate regulator chips for the different voltages.
Thanks once again, this is getting interesting. Bellarmine