SES light and Manual Fan Switch

[mjparme]

My SES light comes on when I drive above 20 or so with the fans on (driving to the staging lanes at the track). Does anyone else have this issue? It goes off after I drive the car a couple of times without turning on the switch.

This doesn't hurt anything does it? As long as it doesn't I don't really care, just want to make sure.

[98Camaro3.8]

The computer isn't telling the fans to turn on, yet they are on, so it gives you the SES light. Most who use the fan switch get the light.

[slow]

you can eliminate the light, by installing 1 watt 47 ohm resistor for the "low" speed fan wire, and 2 47 ohm, in parallel, for the "high" speed fan fan wire, installed between the switch and the fender/fuse box connection.

http://www.fbodyextreme.com/fan_switch.html

This should explain it better.

Ryan.

[Dominic]

The SES is normal and wont harm anything [img]smile.gif[/img]

[mjparme]

Ok, I was almost totally certain that the SES light didn't hurt anything I was just wanting to ease my mind with confirmation.

slow--I have always been curious to know how people figure this stuff out. How did you figure out those resistors would keep the SES light from coming on?? I am assuming you have access to the wiring diagrams to the car and can read them good enough to figure out what does what???
How did someone figure out which wires to tap into to install the manual fan switch??

I am just a curious person and I am just curious to know how people figure this stuff out.

Thanks for the help!!!

[slow]

that is a friend of mine's install page.

the factory relays are 47 ohm resistance, so the resistors keep the computer from seeing 0 ohms resistance ground.

the 2 are used due to the high speed relays being 2 in parallel.

I don't have the wiring diagrams, but found them online.

but as others said, the ses won't harm anything, but if you can avoid it, why not ;)

Ryan [img]smile.gif[/img]

[mrbako]

i've never gotten a SES from my fan switch...should i?

[mjparme]

<blockquote>quote:</font><hr> i've never gotten a SES from my fan switch...should i? <hr></blockquote>

My SES light only comes on if I go over 20 mph or so with the switch on.

[mrbako]

yeah...i can drive w/ mine on...never ever gotten a light..no matter what speed? is this a DIY switch or what?

[mjparme]

Umm, if you define DIY for me I may be able to tell you [img]smile.gif[/img] (I am horrible with acronyms).

[98Camaro3.8]

Do It Yourself.

[mjparme]

<blockquote>quote:</font><hr> Do It Yourself. <hr></blockquote>

Ahh ok, that makes sense.

Yes I put the switch in myself. I used the instructions from the link that is posted here often (found it with search).

It appears from the previous posts in this thread that it is pretty common, so I am not really worried about it.

If it annoys me to bad I will use slow's advice and install the resistors.