Perhaps someone can give me some clues as to what is going on relative to getting a P1258 code. This is an over-temp code and the problem is that I get this code with a cold engine. Checked the...

That was exactly the problem ie load sensing. Motor home electrical systems back in 1983 were wired to accommodate non computer controlled electrical systems and their associated alternator...

Engine swap is getting closer to a test drive. Still have issues though. NO output from the alternator! ..I think the problem is because the BCM was not part of the swap. So, does any one have a...

Dave:

I have attach where I found the spec on the max current from the TCM.

Russ

Just got this donor engine (chev 2012 6.0 L96) running in a 1983 G-30 Van. Engine fault codes (see attached screen shot of errors, [engine not running]) I need help, any suggestions. Have double...

Well, that signal is only good for something less than 100 ma. (.1 amp) most auto relays are 200 ma coils. A simple PNP transistor with the base circuit limiter draws less that 2 ma (.002 amps)....

Thanks Dave...
I am using the signal (park/neutral pin 3 trans. connector ) from the transmission wired to J1-1 (ECM) I am new to this form so hopefully missteps forgiven...

I think I am...

This has been 3 years in the making. Purchased 2012 6.0 L96 VORTEC ENGINE AND 6L90E 6 SPEED AUTOMATIC TRANSMISSION. ECM, TCM, & FCM all stock, harness stock all from the donor vehicle, going into a...