Am I missing something - Chrome ECU Pinouts

[knights19]

After a bit of newbie clarification please.
The wiring loom from my engine has been hacked around a little to fit into my project car and I'm now (after a year) trying to put it back in.
I have a stock 93 ECU, three plugs, left pins 1-26, centre 101-116 and right 51-72. All checks out, some wires repaired etc.

To replace it I have a new Chromed 1st Gen flash ECU that has the extra plug.

Firstly can I check I am able to unplug the stock ECU, plug in the chromed and good to go (as the plug n play suggests)?
One of the forum members sent pictures for a harness conversion which confused me.

Secondly, does anyone have a pin-out cross-reference sheet as the number layout is different despite the three plugs being physically the same? Left pins 1-26 (same), left centre 31-46, right centre 51-62 and right 71-92.

That would also help me wire in the new OBD connector as I have no MUT diagnostic connection (was cut out by the last owner).

Help much appreciated.

[anyonebutme]

Well, first need to verify which chromed ECU you have. There are ones that are actual 99 ecus with a conversion harness and there is the later jester units that plug directly into the car harness of the generation they are configured for. Either option should have came with a new OBD2 port as the mut port is no longer used with the 99 ecu.

[knights19]

Aha, that clears it up. I have a Jester 91-98 GTO, so conversion harness not needed.
However, the OBD has a MUT connector and the extra pins from the new plug in the ecu. So I need to know how to wire the obd directly to the ecu.

[anyonebutme]

http://cloneecu.com/wiring-guides/factory-diagrams

[knights19]

yeah had those already, my point was that the pin-out numbering of the Jester doesn't use the same convention as the OEM ECU and there's an extra plug on the Jester too.

For example, when the how to on fan control for the Jester talks of using pin 95, that uses pin 95 on the Jester not the OEM numbering.

Is there a pin-out description for the Jester? That would help me hardwire in the OBD port.

[anyonebutme]

http://chromedecu.org/?page_id=86

Since the rad pins you mention are not the same as what's on Jester's site as ours are all pins 52 and 53, I'm going to assume the GTO is different and you have to contact jester. He spells out the pinouts on his site for all his versions of plug and play ECU's but you still haven't told me which one you have so I can't help. There's only 92 pins on the plug and play and that pinout diagram is directly copied from the FSM so I don't know where your original pinout numbers come from.

[knights19]

Aha, that clears it up. I have a Jester 91-98 GTO, so conversion harness not needed.
However, the OBD has a MUT connector and the extra pins from the new plug in the ecu. So I need to know how to wire the obd directly to the ecu.

Sorry, pin 52 not 95.

OEM
http://nitroustuning.co.uk/pastedImage.png

Jester
http://nitroustuning.co.uk/pastedImage%20(1).png

See what I'm getting at?

[striker2]

It looks like pins 1-26 on the Jester correspond to 1-26 on the OEM, 31-46 Jester to 101-116 OEM, 71-92 Jester to 51-72 OEM. Then 51-62 Jester are for the extra add on pins.

[knights19]

As it's plug and play obvious really, just use the OEM diagram for the OEM plugs.
Do you know the pin outs for 51-62?

[anyonebutme]

Whatever the 94-97 FSM says I'd imagine. There's jumpers inside that move the connections to the pins that moved during the generation says. It's not like that plug is for optional stuff, it's so you can plug it into a 94-97 which has 4 plugs stock.