My current project: JDM Climate Control - Page 5 - Honda Prelude Forum

U.K VTEC · 08-05-2002, 12:56 PM

Quote:

Originally posted by go pre
oh yeah and here is a pic of the control unit at night..

i think i might have a bulb burnt out though too, because my defrost symbol doesn't light up.

You should have, as you said, the defrost button illuminated. Also, the blue and red arrows for the temp 'up - down' should light up as should the windshield symbol and the recirculate button below that.

But, on my car, the text that reads 'A/C ON', 'FAN' and 'MODE' don't illuminate on my car and I wasn't sure if they should or are even meant to!? That said, they are not buttons like the defrost and recirc., but the white text is printed on like the blue and red arrows and they illuminate...

Oh well, I can live with it.

Forbidden · 08-05-2002, 01:29 PM

Quote:

Originally posted by go pre
I just read up a little bit on transistors and relays, and tested the voltages on the wires in this circuit for the fan blower:

this was without the transistor hooked up, just the relay:
#2 wire is getting slightly over 12v, #4 is getting around 12v, #3 is getting 12 volts, and wire 5 is getting no voltage.

From what I understand of how a transistor works, wire #5 connects to the base of the transistor and will have an effect on the voltage going to #6, the emitter. so, theoretically the fan speed should be controlled by the voltage going through wire 5 from the control unit, but I'm not getting any voltage on that wire at any of the fan settings.

so, either my control unit is busted or it's the wrong wire. forbidden, can you please double check your diagrams again and make sure it's the WHT/BLU wire on the jdm 16p harness?

Yes I just checked again and the #5 wire that goes to the transistor base goes to the No. 9 wire (WHT/BLU) on the JDM 16 pin connector

go pre · 08-05-2002, 03:40 PM

this just gets more and more confusing. when i had the transistor hooked up and measured the voltages, i had 0.5v and 1.9v on wire #5 for the 2 different operating fan speeds.

anyone here an electrical engineer?

Forbidden · 08-05-2002, 04:07 PM

So you had 0.5V and 1.9V at different fan speed settings? And the other settings didn't change the fan speed? What kind of voltage did you get for the other settings?

go pre · 08-05-2002, 04:43 PM

wire #5 was 1.9v for the first 3 fan settings, then on the 4th setting, the relay clicked and it went down to around 0.5v. then, when i went back to speed setting 1, it returned to 1.9v.

can you post the jdm wiring diagram if you have it? that might help me to figure out what's going on and how the transistor is supposed to work.

Forbidden · 08-06-2002, 07:06 PM

Sorry I didn't reply earlier I was gonna reply this morning but my drive for work arrived and I had to leave, I'll try to scan the diagrams I have here tomorrow

Forbidden · 08-07-2002, 04:48 PM

Well I scaned them, they're 570kb and 617kb

http://www.jrcormier.com/prelude/jdm...jdmdiagram.gif
http://www.jrcormier.com/prelude/jdm...dmdiagram2.gif

U.K VTEC · 08-07-2002, 05:03 PM

Just wondering how things are progressing, Jean?

Good, I hope.

Forbidden · 08-07-2002, 05:46 PM

My car is at the body shop right now so I can't work on it right now but I'm gonna make a few calls tomorrow or friday for some parts to continue working on it when I get my car back but it went pretty well 'til now

go pre · 08-07-2002, 07:01 PM

thanks for posting the diagrams.. i'm a little confused as to what type of transistor it is because in the jdm diagram it looks like the emitter is pointing towards the base (it's hard to tell though), which would make it PNP, but in the diagram you drew you have the emitter pointing away indicating it would be NPN. can you verify which kind it is? I just picked up a PNP transistor from radio shack and I'm going to replace the other one as long as it's the right kind.

Forbidden · 08-07-2002, 08:06 PM

yeah it's a bit hard to see on the scan but it's not pointing at the base and it's the same symbol as the one on the CL diagram so it's the same type of transistor as the CL

go pre · 08-09-2002, 05:45 PM

I just picked up another control unit off of ebay, and it came with the sensors and entire heater box so I should have close to all of the parts when it gets here. I'm still not sure if my other unit is bad but I guess I'll know when the new one gets here. forbidden.. when are you getting your car back from the shop? I should get these parts in early next week so I'll have some more info to share then.

Forbidden · 08-11-2002, 03:52 PM

Yeah I believe I saw that unit on ebay, it is probably missing the blower high relay and power transistor but you already have those. And also it's probably missing the rest of the system for the water valve.

My car should be ready early this week, probably tuesday or wednesday

Forbidden · 09-21-2002, 05:27 PM

Sorry if I bring back an old thread but I prefer to have everything in a single thread over 5-6 threads for the same subject, makes it easier for people when they'll search on this.

It's already been over a month since I've had the chance to work on the Climate Control, the power transistor took like 2 weeks to get here and I didn't knew how much of a pain it is to order relays from my local Honda dealer so I ordered the fog light relay and subharness from hap.com and it took like 3 weeks to get here, when I opened the box there was only the relay cause the subharness had been discontinued... if I had knew before I would've bought a relay at a scrap yard or something...

Well I hooked up my blower motor and now I have a big mess of wire under the passenger side of the dash but the blower works!! I tried all speed and everything was fine! That blower spins really fast when you hold it in your hand

The only thing is that since I didn't have the real connectors for the power transistor and the relay, I had to be a little creative and use connectors for each pin of the transistor and the relay. I'm gonna use a glue gun to make sure the connectors are stuck in place. It's gonna be a permanent connector but after it'll be done I don't think I'll want to remove it

red92s · 09-22-2002, 10:13 AM

SWEET!!

prelude2005 · 09-22-2002, 10:34 AM

damn, I wish this was just plug and play stuff

Forbidden · 09-22-2002, 11:27 AM

red: Sweet indeed! at least if I don't finish it up soon I'll still be able to set the temp manually from under the dash and not freeze this winter

prelude2005: If it was plug and play where would be the fun of having it?

BTW I love those pics in your sig, how the hell do you keep you car clean like that?

prelude2005 · 09-22-2002, 11:55 AM

Quote:

Originally posted by Forbidden
red: Sweet indeed! at least if I don't finish it up soon I'll still be able to set the temp manually from under the dash and not freeze this winter

prelude2005: If it was plug and play where would be the fun of having it?

BTW I love those pics in your sig, how the hell do you keep you car clean like that?

thanks man, zaino works...some good stuff for the 4th gen luders.

btw, can you like get pics, draw out wiring (MS paint is fine) and list what all relays, plugs, wires, or anything else you need?

Forbidden · 09-22-2002, 03:35 PM

I think I have most of that stuff in my write up already, I have more pics but they are still in the cam, I'll have to get them out and I'll put them on the page as well

concLude · 10-01-2002, 12:05 PM

DAMN, i live in Northern VA, and had a full JDM bb4 front clip just sitting there with all these parts! I wish I belonged to preludeonline before i burned the entire dash and everything up! oh well still have the climate control like forbidden started out with, taht was the easiest thing to take!