Tacoma88 0 Posted August 28 Hi everyone I’m new to this page and looking for alittle help if someone can help figure out an issue. I have 1988 honda foreman 350d and I have to replace the fan control unit on it and the one that has the correct wiring is discontinued. Soo I have to go aftermarket, the wires on the after market aren’t the same color at all. Soo I was wondering if someone had an idea of which color wire to hook up to what wire. From the Honda it’s I have blue wire green wire black and brown wire white wire blue and red wire light blue wire coming off the new control unit has two different plugs one plug with two wires yellow black and white the second plug has 4 wires green Red blue yellow green red yellow Share this post Link to post Share on other sites
jeepwm69 7,233 Posted August 28 Welcome aboard. Most of the aftermarket stuff you can get for these machines is utter garbage. Did you try baking your OEM module? Some of our electrical guys here have found that putting a CDI or FCU in a preheated oven at 450 degrees for 7 minutes )plug facing up) will often bring them back to life. Share this post Link to post Share on other sites
jeepwm69 7,233 Posted August 28 Also, if you want to change your username to something OTHER than your email, just in case spam bots copy it and send even more spam your way, let me know what you want your username to be and I'll change it. I think this forum is less susceptible to some of the internet mal stuff that goes on, but still better to not have personal contact info posted where searching bots can find and copy it. Share this post Link to post Share on other sites
Tacoma88 0 Posted August 28 Thanks, for replying before I joined this I saw someone mention that and I tried it didn’t work but I also didn’t put it that hot soo I’ll try that first thanks for the advice. I’ll try it and I have no idea how to change my username lol Share this post Link to post Share on other sites
jeepwm69 7,233 Posted August 28 14 minutes ago, [email protected] said: Thanks, for replying before I joined this I saw someone mention that and I tried it didn’t work but I also didn’t put it that hot soo I’ll try that first thanks for the advice. I’ll try it and I have no idea how to change my username lol Tell me what you want it to be, and I'll change it for you. Share this post Link to post Share on other sites
Tacoma88 0 Posted August 30 Soo I put it in the oven a 450 for 7 min then let it gradually cook down and hooked up and let the atv run for a little bit, fan still didn’t turn on. How long do you usually have to let it run before the the fan kicks on, if the control unit is working ? Share this post Link to post Share on other sites
jeepwm69 7,233 Posted August 31 On 8/30/2023 at 7:09 AM, Tacoma88 said: Soo I put it in the oven a 450 for 7 min then let it gradually cook down and hooked up and let the atv run for a little bit, fan still didn’t turn on. How long do you usually have to let it run before the the fan kicks on, if the control unit is working ? The older air cooled Hondas have to get pretty dang hot for the fan to come on. That said, I think you might find this thread helpful. "Disconnect the oil temp sensor lead and touch it to the footpeg. The oil light should come on steady and fan should come on" Oil temp sensor should be #33 on right side of engine. Should be one wire going to that sensor. Pull it off and touch it to your footpeg with the key on. Fan and oil temp light should come on. https://www.partzilla.com/catalog/honda/atv/1988/trx350d-a-fourtrax-forman-4x4/right-crankcase-cover And this one. 1 Share this post Link to post Share on other sites
_Wilson_™ 6,435 Posted September 1 (edited) I was just looking around and located this shade posted this back in 2010.... Quote just restored my trx350d foreman..and it takes alot of heat..around 400 or 500 f to make the oil cooler fan to come on.. i still plan in doing that add on diy programmable fan control unit on the 00 300... I put the hondaline cooling kit fan and brackets on, but I'm not hacking the wire harness to run the oem fan control unit... IMO a programmable one is way better....but when i saw shades post... Now have some idea of the temps it triggers at.. Edited September 1 by _Wilson_™ Share this post Link to post Share on other sites
Fishfiles 19,770 Posted September 1 If you get tired of trying to get it back to stock , run into a dead end or parts are not available for the older unit ----- you can go to a site such as Summit Racing and buy a electric fan controller pretty cheap, they come with a sensor that slides into the fins of the cooler and the unit can be adjusted to the temperature you want it to come on and go off 1 Share this post Link to post Share on other sites
