how to make an LLY bench harness?

[Cougar281]

Well, I sucessfully built a bench harness, have a TCM connector, need to find an LLY ECM connector still, anyway, for testing, I used a Werker 7.5Ah Sealed battery, and hooked my meter in to read current. The TCM drew .365 Amps during reading and powered on. Turn the "ignition" off, and it drops to .265A, then ~30 seconds later, drops to nil (when the TCM turns off). Not a very high current. So for normal use, should I get a new 7.5Ah sealed battery and use that, or should I use the "Wall Wart" AC Adapter that delivers 12.53VDC with no load, and is rated to deliver 3A? Or should I go out to Radio Smack and get a 13.8VDC 3A Power Supply?

[SinisterSS]

This is what I use --> http://cgi.ebay.com/MASTECH-VARIABLE...em120034800780

[GMPX]

I got myself a Speartech LS2 bench harness, with a little modification it can be used for the LS2, LLY and a few others (5cyl PCM).

Cheers,
Ross

[Cougar281]

I got myself a Speartech LS2 bench harness, with a little modification it can be used for the LS2, LLY and a few others (5cyl PCM).

Cheers,
Ross

Neat harnesses, but WOW... not cheap. My whole deal has cost me like $20 so far, and it's really not much different than those overall. But then I like to build stuff.... Are there any other vehicles out there that use the same connector (Blue C1) as the 04/05 LLY?

SinisterSS - Pretty cool power supply. I'll have to keep that in mind...

[GMPX]

Plenty of other vehicles use that plug from 4cyl, 5cyl, V6, but, the pinouts are different so it is necessary to install a little switch box.

Cheers,
Ross

[Cougar281]

Plenty of other vehicles use that plug from 4cyl, 5cyl, V6, but, the pinouts are different so it is necessary to install a little switch box.

Cheers,
Ross

Pinouts are no big deal... Since I would only be using it on my LLY ECM, I would re-pin the connector. What years/models? I'm assuming circa 2004 and up?

So far, the only ECU I've confirmed has the same connector is the 2004 3.8L Grand Prix. The ECU looks identical tot he LLY ECM from the outside... Are they the same hardware inside? Could they be programmed with an LLY OS?

[Cougar281]

In case anyone's interested, per my local dealer's parts dept, the Blue C1 connector can be found on the following vehicles (but not limited to these):

2003-2005 Cavalier
2004-2005 Monte Carlo
2004-2005 Grand Am
2004 (and I'd assume 2005) Grand Prix
2005-2007 Cobalt
2005-2007 G7
2005 Corvette

[Code3Response]

Cougar or DURAtotheMAX or anyone else thats made a bench harness.... any pics?

[Biodiesel66]

Cougar or DURAtotheMAX or anyone else thats made a bench harness.... any pics?

Here's 1 I use on all 3 Duramax controllers.

[Code3Response]

Thats real nice.... all custom made? Anyone manufacturing these things?