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Pin 1R. It's grounded to turn the fan on.
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Originally Posted by Ben
(Post 334902)
Use a DMM or testlight to see if the fan is getting power, then start tracing back. There's a relay in the underhood fuse area, probably a fuse in there too. If you've done any 'experimenting' with a dual fan set up and a/c, it's likely you've blown the relay.
I hijacked the fan switch and re-wired it to the a/c fan through a DPST relay. So the main fan comes on at the temp set by MS and the secondary fan comes on with a/c or at where the fan switch is set-207 I think. I did this but was almost certain that I switched it back to stock (quick change for the track) due to the addition of the slim fans and uncertainty with MSpnp. If I forgot to switch everything back, did I just lose $700 by burning up my computer? Any links or preferably pics how to wire up the relay? I'm electrically stupid. I need to set this up so MS turns on both fans because the AC is gone. Man, I'm super fucking nervous right now. $700 down the shitter. Looks like going the turbo route was a mistake because I'm dumb. |
^ Calm down. It sometimes scares me that you have any influence in any decision-making related to the spending of my tax dollars.
Look at Ben's post here for a slick dual stage fan setup. It's currently successfully implemented on my car, as well as his old '91. It's nearly impossible to have fried your MSPNP just by screwing with the fans. Have you even tried jumping the fans at the connector? Tracked wiring at all? |
Originally Posted by Atlanta93LE
(Post 338007)
^ Calm down. It sometimes scares me that you have any influence in any decision-making related to the spending of my tax dollars.
Look at Ben's post here for a slick dual stage fan setup. It's currently successfully implemented on my car, as well as his old '91. It's nearly impossible to have fried your MSPNP just by screwing with the fans. Have you even tried jumping the fans at the connector? Tracked wiring at all? I've never been good at electrical shit because I don't know much about it and I've never learned enough to be confident enough to make major decisions...and i smoked every ground wire in my jetta once because I forgot to connect a gnd on the transmission. I'm speaking from another bad experience. |
Originally Posted by hustler
(Post 338010)
Well, I'm confident in my work with my programs because I'm educated and understand the process.
I've never been good at electrical shit because I don't know much about it and I've never learned enough to be confident enough to make major decisions...and i smoked every ground wire in my jetta once because I forgot to connect a gnd on the transmission. I'm speaking from another bad experience. Anyway, try jumping the fan at the connectors. If it works, work your way back to the ECU. You'll figure it out. |
Originally Posted by Atlanta93LE
(Post 338012)
As somebody who has a hand in developing some of the FEMA documents that I hope you use, it still scares me ;)
Anyway, try jumping the fan at the connectors. If it works, work your way back to the ECU. You'll figure it out. |
Yes, I am that good...
Originally Posted by Ben
2 stage fan mod
Goal: Have first fan stage circuit excite at 175 F. Have second stage fan circuit excite at 206 F. Do not interfere with A/C control over pass side fan. Result: engine temp < 175 F = No fan engine temp > 175 F & < 206 F = Single stage fan engine temp > 206 = 2 stage fan (both fans running) A/C on = A/C fan on, regardless of engine temp Required items: SPDT relay, primary wire, crimp connectors, electrical tape, 30A fusible link Instructions: The relay has 5 positions, wire as follows Pin 30 to A/C side fan black/blue stripe wire FAN SIDE OF WIRE Pin 85 to thermosensor Pin 86 to +12V Pin 87 NO to +12V (high power) Pin 87a NC to A/C side fan black/blue wire on the CAR SIDE OF WIRE You need a real automotive SPDT relay with a true NO contact and a true NC contact. The el cheapo $1.49 relays probably won't cut it. It should run $7-10. You can grab +12V at the underhood fuse box. There are a variety of places. I had an unused position, so I crimped a spade connector onto a 14ga wire, and inserted it into the bottom side of the unused positon. Then reinstall the fuse block and insert a 30A fusible link. *(I ran this wire to both pin 87 (high power input) and pin 86 (switched 12V) so that my relay had power full time. If you wanted the relay to only work key on, you would need to run a switched on +12V source to pin 86.) The A/C side fan has 2 wires. Leave the black wire alone. Cut the black/blue stripe wire. The side of the wire that goes to the fan connects to pin 30 on the relay. The side of the black/blue wire that comes from the car goes to pin 87a on the relay. The thermosensor on top of the thermostat housing has only one wire. Cut it and bring it to pin 85 on the relay. Tape everything up and make sure all your wiring is secured. Enjoy |
Hustler, I ran into a similar issue and at the end of it all it ended up being just bad connections at the fuse box where the realy pins are. They were not lining up correcty and getting a good connection. You might have also caused the realy to go bad as I did mess up 2 of my self just testing stuff. Take a look at my post here it might help.
https://www.miataturbo.net/forum/t25604/ |
Originally Posted by zarish
(Post 338032)
Hustler, I ran into a similar issue and at the end of it all it ended up being just bad connections at the fuse box where the realy pins are. They were not lining up correcty and getting a good connection. You might have also caused the realy to go bad as I did mess up 2 of my self just testing stuff. Take a look at my post here it might help.
https://www.miataturbo.net/forum/t25604/ Brain, is there a more simple solution to getting both fans to come on. I don't need that multi-temp shit, I just want them to turn on when shit gets hot. I'm going for "easy" here because I don't have very much time to do all this...in a hotel parkinglot. |
https://www.miataturbo.net/forum/t10109/#post117025
edit: maybe I screwed this all up a long time ago, and the 2nd clt sensor kept turning on the fans. Man, I'm dumb. |
My name ain't brain.
I told you like 10 years ago to not do the stupid "hakuna mod". then I told you a few days ago to un-do any modifications you did to your fan system and bring it to stock. you don't listen, then you bitch when sh!t don't work. hmm. bring your junk to stock. then do the mod I outlined for you. it's 10 minutes worth of work, being ---- and careful. there are at least 3 cars running fans the way I've outlined. |
lol, you're my dad. I listened, and spent a few hours working on it, and i think it was back in stock form.
thanks for the write up. I'm going to get this figured out on sunday I hope. |
so is there an absolute minimum for the fan trigger temp? Its 46* outside and what I believe to be pin 1R is not going to gnd when set at 50* (10*f in reality)
for future searching: pin assignments |
so, is there a how-to on assigning additional outputs to switch to gnd, so I can still have a fan?
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The absolute minimum is -40 degrees.
You can use the boost control as output 1 for a second on/off control. |
which pin or wire can I just to MS for "dual fans"? I was told I could do this with the AC wire, since I pulled the compressor. I still can't get the fans to work.
things I know: both fans come on with the AC switch driver side fan comes on with the TFA and GND pins jumped i have continuity at the black/green wire from the MS computer connector to the fuse panel plug I have continuity at the black/green wire on the fuse box side with the computer I have continuity with the black/green wire (pin 1r) at gnd with the value set at 70* (actually triggered at 50*) I am confused. |
if the front fan lead activates the fans when i gnd the plug...does that mean the wiring is in working order and the fans will come on when triggered by the front sensor?
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Originally Posted by hustler
(Post 362170)
if the front fan lead activates the fans when i gnd the plug...does that mean the wiring is in working order and the fans will come on when triggered by the front sensor?
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Originally Posted by thesnowboarder
(Post 362173)
hustler im thinking yes, you can test it by splicing your oem sensor back into place and dipping it into some hot water. Or install it inline with your coolant and wait for the temps to rise and turn the fans on.
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Originally Posted by hustler
(Post 362181)
Can I just heat that bitch up with a torch and see if it triggers?
What are you giving away? Im looking for a thermostat housing to do that remote thermostat i PMed you about. |
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