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Today was the day to fire up the new engine in my 94. To my dismay when I turned the key there was not even an attempt to start. Knowing the one area I had questions on was the wiring near the ECU. I appear to have some 'extra' connectors. One of the female spade connectors (the top two circles) is from the emissions harness and the black connector (has about 6 pins used in it) is from the emissions harness as well. Then there is another female spade connector coming from another harness.
I did a few hours of searching on here but always got the same few photos and nowhere did I see any of the three connectors I have. When I pulled the ECU out I swore I simply pulled the necessary plugs to remove the emissions harness for pulling the engine. I hunted around the kickpanel area but don't see anywhere obvious that these go...
Car is a USDM 94 Touring 5-speed. 99% sure it hasn't been tampered with (until now). I purchased a brand new harness from Ray, but would have to dig to see if I perhaps got the wrong harness. I never checked when it arrive, but this does look identical to photos online of new M/T harnesses.
There could be a few other reasons the car won't start, but I haven't dug enough to be asking questions on that yet. Getting an answer to this just eliminates a variable.
The photos are identical, I just posted an unedited copy for reference.
The new harnesses from Mazda have the fan recall harness built in. The multi pin black connector is the connector for the fan control module, the 1-pin black connector is the test connector to test the system out.
There's a black box in the upper right of the picture that has a label that says "CONTROL UNIT" you can only see part of the label in the picture. It currently has something plugged into it, you may still have the old fan recall harness in the car. Do a search on it, there's a number of threads with pictures (one actually within the last week or so) showing the fan recall harness and what it looks like.
All that said that shouldn't keep the engine from starting. There's a ground wire coming off the harness that I don't see in the picture, that does need to be grounded, again don't know if that's going to keep you from starting.
After reading thru the Fan Control thread you started years ago it makes more sense. I'm assuming I can poke around and remove the existing recall fan harness and just connect my new emissions harness to the original connectors?
As for no start...I think there are some clues but I don't want to post a question without any troubleshooting. Yesterday I spent most of the day putting the slave cylinder back in, didn't realize you could have the rod miss the clutch fork...brake fluid all over!
Yep, remove the existing fan control harness and plug the black multipoint connector into the fan control module. Leave the 1-wire connector hanging out, that's only for testing the fan control module.
Been there done that on the slave cylinder. I typically pull the starter to get my hand up in there to make sure the slave is seated properly onto the clutch fork.
Spot on with the harness, and good tip on the pushrod. After messing with the slave cylinder for way too long I still didn't have the pushrod in the right place.
And after removing the recall harness everything made perfect sense and is so much cleaner.
