| Re: [GMCnet] Bought that new electric clutch for the engine fan. [message #324343 is a reply to message #324332] |
Mon, 25 September 2017 10:28   |
KB
Messages: 1262
Registered: September 2009
Karma:
|
Senior Member |
|
|
Matt Colie wrote on Mon, 25 September 2017 06:30
I have a minor addition to Tom's post.
"REMEMBER YOU CAN HAVE A(NY) SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.)
In the near term future, I plan to use the temperature into the water pump and the outlet of the A/C condenser both as control signals. Someone with a 7747 processor you enable one of the included analog switches for this function.
I strongly suggest that you include a visual indicator as the fan noise is very different and you will not be certain of what that new and non-impressive noise relates to.
Matt - near 3k on the new fan and still impressed.
I haven't found a pin on the stock 7747 ECM to control a fan, but the EBL modified version definitely has one,
and it works. I've got the fan installed (gorgeous thing) and tested all the inputs, ie a manual switch at the dash
and the relay controlled by the EBL. We've only gotten to run it at idle so far, so can't tell if the fan itself works,
but I fully expect it to. It seems to be noticeably quieter than stock, or even the asymmetric later style fan we were running,
at least at idle. The EBL makes it really easy to play with the on/off temps and a few other parameters.
We are SUPER looking forward to having this thing on our long trip home across three mountain ranges.
The trip out with two busted fan clutches was not fun.
THANK YOU again to Tom for this mod. One of the best things I've seen so far for the GMC (or other old vehicles),
and that's saying a lot.
Karen
1975 26'
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
