D-a-n-i-e-l Posted July 26, 2013 Share Posted July 26, 2013 I need the pin out for the 88 ecm and the connectors. It is not posted on Reatta.net and all the libraries around here do not have access to Mitchell. Link to comment Share on other sites More sharing options...
padgett Posted July 26, 2013 Share Posted July 26, 2013 This should be what you need. Link to comment Share on other sites More sharing options...
D-a-n-i-e-l Posted July 26, 2013 Author Share Posted July 26, 2013 Thank you Padgett. Once I have all the repining requirements hammered out I will post them. You never know when some one might not be able to get the right harness. I am just a little saddened to know this one came out of a Select Sixty. Link to comment Share on other sites More sharing options...
D-a-n-i-e-l Posted July 27, 2013 Author Share Posted July 27, 2013 Ok the only re-pinning that needs to be done to use a 88 engine harness on a 89 is the vss wires need to be added to the ecm harness. these are purple to B9; yellow to B10; and brown from BCM to B11. The purple and yellow wires are already in the loom that comes through the firewall and only have to be removed from the large rectangle plug and repined to the specified positions. The brown wire is already in the 89 wire harness and would only have to be pulled from the old position in the original 89 harness and added to the 88 harness. Link to comment Share on other sites More sharing options...
Ronnie Posted July 27, 2013 Share Posted July 27, 2013 Have you thought about the cooling fans being controlled differently on '88 models versus other models? I'm pretty sure that part of the harness will be different. I'm not sure about the ECM. Link to comment Share on other sites More sharing options...
ol' yeller Posted July 27, 2013 Share Posted July 27, 2013 I love reading these posts. I have no understanding of what they are talking about but I love listening to them. I read every one. It is kind of like listening to 2 French girls converse in French. You know it is interesting and yet I have no clue. Keep it up guys! Someone needs to understand how this stuff works. Maybe I should write a book, Reatta For Dummies. Link to comment Share on other sites More sharing options...
KDirk Posted July 27, 2013 Share Posted July 27, 2013 I'm glad others find these things interesting. I sometimes feel bad when I get into a highly technical post/thread that likely only a handful of other forum participants can readily follow. I am frequently guilty of talking in jargon that relates to the inner workings of the vehicle electronics, and only later realize how some of these posts must look to the more casual Reatta owner. Specialized knowledge is a wonderful thing until it puts off others who may find it's discussion pretentious. Hope I don't come off that way sometimes.KDirk Link to comment Share on other sites More sharing options...
D-a-n-i-e-l Posted July 27, 2013 Author Share Posted July 27, 2013 The fan output is the same on both ECMs. I did not check where they go (on my car I added a jumper to turn the fans on with the key being in run, keeping my car engine temp 165 to 185) I had actually wondered if it went to the BCM on the 89. Heck let me check...On the 89 they go to two different relays ( high and low). I do not have a 88 diagram but the pin outs are the same from the ecm from both years (with the same labeling). So one may have to splice or repin into the correct connections on a harness swap. Link to comment Share on other sites More sharing options...
Guest Corvanti Posted July 27, 2013 Share Posted July 27, 2013 I'm glad others find these things interesting. I sometimes feel bad when I get into a highly technical post/thread that likely only a handful of other forum participants can readily follow. I am frequently guilty of talking in jargon that relates to the inner workings of the vehicle electronics, and only later realize how some of these posts must look to the more casual Reatta owner. Specialized knowledge is a wonderful thing until it puts off others who may find it's discussion pretentious. Hope I don't come off that way sometimes.KDirkno problem here - though i'd rather work on vehicles with a distributor and points. i also try to read all threads but sometimes my brain interprets some of tech posts as "blah, blah, blah"... but if i ever do have a problem, for more info than the FSM has, i know i can use search and find the solution. i just have to get the noggin to accept it. nowadays it seems like i need to limit new info as to things i really need to know!!! Link to comment Share on other sites More sharing options...
handmedownreatta Posted July 27, 2013 Share Posted July 27, 2013 I love reading these posts. I have no understanding of what they are talking about but I love listening to them. I read every one. It is kind of like listening to 2 French girls converse in French. You know it is interesting and yet I have no clue. Keep it up guys! Someone needs to understand how this stuff works. Maybe I should write a book' date=' Reatta For Dummies.[/quote']i always read this stuff hoping to learn how to make my car do more cool stuff. Link to comment Share on other sites More sharing options...
Ronnie Posted July 27, 2013 Share Posted July 27, 2013 Daniel: The photos below will show the differences between the '88 model cooling fan wiring and the '89. As you can see in the diagrams the wiring is different on the inputs to the relays as well as the outputs of the relays. Note that the '88 model used a large resistor reduce puller fan speed and the '89 did not. I hope this helps you sort out the changes in the wiring. Link to comment Share on other sites More sharing options...
padgett Posted July 27, 2013 Share Posted July 27, 2013 Correct there are two lines from the ECM, one for low fan the other for high. The difference is in the relay logic and the resistor on the 88. If you don't mind a little more noise you can jumper out the resistor and the puller will always be at the high speed. Link to comment Share on other sites More sharing options...
Guest Mc_Reatta Posted July 27, 2013 Share Posted July 27, 2013 Daniel, Are you swapping the engine harness only, or also the dash harness.Maybe you should be looking at the thru firewall connector pinouts too if not replacing both. Link to comment Share on other sites More sharing options...
Ronnie Posted July 27, 2013 Share Posted July 27, 2013 Correct there are two lines from the ECM, one for low fan the other for high. The difference is in the relay logic and the resistor on the 88. If you don't mind a little more noise you can jumper out the resistor and the puller will always be at the high speed.I've had a jumper across the resistor on my '88 for some time now and it does help keep the engine cooler in stop and go traffic. Link to comment Share on other sites More sharing options...
D-a-n-i-e-l Posted July 27, 2013 Author Share Posted July 27, 2013 Daniel, Are you swapping the engine harness only, or also the dash harness.Maybe you should be looking at the thru firewall connector pinouts too if not replacing both. I am using the 88 harness to build the harness for my series 2/3 and F40 swap. I figured throwing out a little information out there that would give people more options could not hurt. The two pins send the same signals so they can be used in either year. As far as the pin out for the firewall; it does no exist. The wires go through a seal plate but are solid until the ECM and body harness connection. Link to comment Share on other sites More sharing options...
D-a-n-i-e-l Posted July 28, 2013 Author Share Posted July 28, 2013 OK I believe I need one more piece of information. I need the pin out for the 88 engine harness to body harness connector. This is a rectangle plug that integrates the engine harness to the body harness. Any and all help is appreciated. Link to comment Share on other sites More sharing options...
padgett Posted July 28, 2013 Share Posted July 28, 2013 I'll see about scanning but the color code should be the same. Link to comment Share on other sites More sharing options...
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