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discontinued fan control unit

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I have a 1987 Honda trx350D. The fan control unit malfunctioned, discontinued and the only NOS is 400.00. The 1995-2006 TRX400fw has the same schematic as the 1987. The only difference I can see is the 87 has a 6 individual wire pigtail and the 95-06 uses 2 plug in connectors with a total of 6 wires. I want to modify my 87 atv harness from 6 individual wire pigtail to the 2 plug style. I can figure out the 2 wire connector is the thermal sensor, the 4 wire plug is another story, which wire goes to which terminal? Any Ideas?

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i'm all for oem, never would i '' jerry rig '' wires on my toys. if funds is an issue ?, then just install a fan bypass switch, be done with it.

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By-Pass like Shade says is a good way to go -------  and you can take the by pass to the next level with a Summit fan controller , on my 95 300 I have two fans and the oil coolers  relocated , this little Gizmo controls which temp  the two fans kick on indepently , cost was $75 two years ago ,  made by David White out of Australia , sold by Summit Racing , and you don't have to cut into the existing harness ---- Retro makes a very nice fan controller from scratch  and Goober is his apprentice , I have one on my 450 , there is a nice thread on it here on the site  

image.png

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I agree, OEM is the way to go and I am going to use an OEM fan control unit. Honda discontinued it and I don't trust used electronics. I'm trying to use what OEM still makes. Here are an 87 trx 350D and a 95-03 trx 400FW schematics, what is the difference, except the connectors? 

20211230_173306.jpg

20211230_173622.jpg

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If I could switch to the newer connectors then I could use this FCM.

Honda Fourtrax Foreman 350 D 87 Fan Control Unit 38710-ha7-671 31435

Good Usable Condition. Honda Fourtrax Foreman 350 D 87 Fan control unit 38710-HA7-671 31435 123.99 Product Details Manufacturer Part Number 38710-HA7-671 Shipping Our mission ...

Honda
 

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On 12/30/2021 at 4:39 PM, [email protected] said:
 

If I could switch to the newer connectors then I could use this FCM.

Honda Fourtrax Foreman 350 D 87 Fan Control Unit 38710-ha7-671 31435

Good Usable Condition. Honda Fourtrax Foreman 350 D 87 Fan control unit 38710-HA7-671 31435 123.99 Product Details Manufacturer Part Number 38710-HA7-671 Shipping Our mission ...

Honda
 

This is not a fan control unit; this is a fuel cutoff relay.

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Sorry about the repeat of this post but I had to change my email and display name.

 

I have a 1987 Honda trx350D. The fan control unit malfunctioned, discontinued and the only NOS is 400.00. The 1995-2006 TRX400fw has the same schematic as the 1987. The only difference I can see is the 87 has a 6 individual wire pigtail and the 95-06 uses 2 plug in connectors with a total of 6 wires. I want to modify my 87 atv harness from 6 individual wire pigtail to the 2 plug style. I can figure out the 2 wire connector is the thermal sensor, the 4 wire plug is another story, which wire goes to which terminal? Any Ideas?

I agree, OEM is the way to go and I am going to use an OEM fan control unit. Honda discontinued it and I don't trust used electronics. I'm trying to use what OEM still makes. Here are a 95-03 trx 400FW and an 87 trx 350D schematics, what is the difference, except the connectors? 

20211230_173306.jpg

20211230_173622.jpg

 

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Posted (edited)

Rocky Mountain atv shows all 86-89 TRX350A and D FCU are the same pn:

38710-HA7-671 supersede 38710-HA7-651

 

Here’s one from Power Sports Nation. 30-day warranty. The listing appears to have the wrong part number 36100-HA7-671 is the fuel cut relay 

 

Update Hay this listing seems wrong why is this coming up on my FCU search?

 

https://www.ebay.com/itm/Honda-Foreman-TRX-350-D-88-Fuel-relay-36100-HA7-671-30800-/363503984030?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=711-127632-2357-0

Edited by Goober

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OK 350DD, took the front of my 450ES apart and took this pic of the fan control.  You should be able to see what wires go where on the 2 plugs.

Fan Control.jpg

 

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7 minutes ago, bcsman said:

OK 350DD, took the front of my 450ES apart and took this pic of the fan control.  You should be able to see what wires go where on the 2 plugs.

Fan Control.jpg

 

BCS , Looks like the light blue wire to your temp sensor has been repaired with spade connectors 

fullsizeoutput_f47.jpeg

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Yes fish when I installed a fan switch it was part of my mod......

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12 hours ago, 350DD said:

Thank you very much! I'll post the results.

Hope it helps, thankfully had the front end apart a few times and didn't take as long as first time.  Just have to remember where all the fasteners and bolts go....lol

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