Manual Fan Switch SES Light Fix Inside!

[Bass482]

Ok, for those of you who did this fan switch mod or one like it:

Homemade Manual Fan Switch

You probably throw a code and get the annoying SES light in your face!

There's an easy fix...

You need to buy three 47ohm 1watt resistors. Make sure they are the correct ones!

The idea is to increase the voltage to around 5 volts so that the pcm doesn't think anything is wrong when it checks the relay. It does not affect the normal operation of the fans and has no adverse effects that I've found yet!

Solder one resistor in series in the Dark Green Wire (this is the one for low speed) It should look like this:

This is the wire:-----
This is the resistor:~

------ ~ ------

Make sure to wrap it in electrical tape to keep from possibly shorting something out.

Next, cut the dark blue wire (the one for high speed) and solder two resistors in series with the wire.

It will look like this:

------ ~ ~ ------

Wrap it all in electrical tape, and you're good to go.

I've been running with this for about a month now, and no problems at all! No more SES light either. :D

EDIT: I should probably have mentioned this is a OBDII fix only...OBDI cars are totally different...

[ September 22, 2002: Message edited by: Bass482 ]

[ August 04, 2003: Message edited by: Bass482 ]</p>

[ravenp]

Hey man.. that's a cool posting.

I used different instructions and haven't had any SES lights on my 97. It called for 470ohm resisters and I used 487ohms. Not sure if that had anything to do with it... i'm not much on electical stuff [img]smile.gif[/img]

http://members.rogers.com/ravenp/fanmod.htm

[2001camconvert]

I know dumb question but I am asking it any ways . What is a OBDII? I have a 2001 and was thinking about doing the fan switch.

Jack

[Bass482]

OBDII stands for On Board Diagnostics Generation 2. It's the computer system that your car uses to run. I think they started using OBDII in 96? i'm not sure, but Your 2001 is definatly OBDII.

[SLOWBRAEATER]

If you hook the homemade fan switch up correctly you wouldnt have to go through all the bs with resistors and crap!

[pvtschultz]

OBDII started with the 95 3.8 in the FBodies. I don't think that the 3.4 had it though, but I know that the '95 3.8 does.

[Bass482]

<blockquote>quote:</font><hr>Originally posted by SLOWBRAEATER:
If you hook the homemade fan switch up correctly you wouldnt have to go through all the bs with resistors and crap!<hr></blockquote>

Sorry bud... I hooked it up correctly and it still threw a code, and many other people have also :rolleyes: This is for the people who have that problem. Maybe its only a problem with the 2K+ cars...