This is the budget setup to ensure the lowest cost up front and best
results for a Taurus 2 speed fan setup. Special thanks to Onovakind67 and
Aceshigh at NastyZ28.com for all of their work on this.
#1. You need 2 temp switches for 2 speeds.
Solution = BMW 91 / 99* C (180/195*F) dual temp switch Part #61311378073< $12 from Rock Auto - can't beat that.
One single temp switch instead of 2, just gotta drill and tap a brass adapter fitting to accept the M14 x1.5 thread.
#2. Heavy duty controller for 2 speeds. (Thanks Onovakind67)
94-97 850 Volvo vehicles used a heavy duty relay dual fan controller part # 1398845
Cooling fan relay for any 960, 940 92-95, 850 all, 740 92, S/V90 all, S/V 70 98-00, C70 Turbo 98-04.
92-95 960 and 940
98-00 S/V 70
98-04 C70 Turbo
92 740
S/V 90 All
850 All
Volvo Controller = $10-$20 Salvage yard or ~$50 new.
BMW Dual Temp Switch = $11
Make sure your alternator can handle the load. I switched to a 144amp unit
144amp alternator
Here's the simple schematic ,
You can optionally wire in 2 LED's so you know when each fan is on.
You don't want to interrupt the main batt wire to the volvo relay with the ignition relay. because you have now limited your hi amp volvo relay to 30-40amps. you want to interrupt the ground wire on the temp sensor.
85 ground
86 ignition
30 ground
87 to temp switch ground
87a nothing
this will allow the volvo to stay connected to the full power of the battery, and turn the fans off when the key is off
Okay guys/gals I have finally got all the parts with photos to help out further on this great thread.
#61318361787--BMW temp switch 180*/195*
#61311378073--BMW temp switch 195*/210*
#61131378412--BMW 90* angle connector
#61130007445--BMW 90* green connector wires 2 required
#61130007446--BMW 90* green/black connector wire for ground
#1398845--------VOLVO dual fan relay, sorry no info on connectors(YET) except for the wires coming out for the temp switch high/low. Mine were completely disintegrated so I ordered 2 new wire assemblies and stuck them in the old connector.
#3523813--------VOLVO white wire assembly for temp switch 2 required.
By the way the pack of aluminum washers is for the temp switch itself, my uncle who is a german car mechanic told me it is required to have an aluminum crush washer for leaks ? got it from local parts store for 3 bucks.
Brass hex head bushing, use for BMW temp sender. All you have to do is tap it with a 14mm x 1.5 tap. This brass fitting is short and no need to drill out just tap it.
Item #: 48938
HEX BUSHING 1/2X1/8"BRS
http://www.acefactorystore.com/proddetail.asp?prod=48938
Recap of my set up:
Stock radiator (new)
2 gals antifreeze + 2 gals water
Water Wetter
160* thermostat
BMW 195*/210* temp switch
Volvo Relay
2 speed Taurus fan
140 amp alternator
Finally fired up the motor. After timing I let it idle at 1500 rpm for 30 min. The thermostat opened at 160*, the fan kicked in at 195* the temp actually dropped and the fan cut off!! It cycled several times this way. Temp never went over 200*. High speed never cut on. This was in my garage 50*+ day. The alt. kept steady and the lights did not dim.
Using Ace's diagram I wired up the power outlet, cooling fan manual switch and the LEDs.
Low speed on
High speed on :crazy:
I found the bracket on a S10 firewall, I'm sure other Chevy's use the same bracket. I cut off one of the brackets.
I cut with the Dremel the lock tabs and the ears off of two brackets.
The brackets line up with the Volvo relay perfectly!! And lock on. You have another mount for the relay to switch the negative lead from the temp. sender.
Front view.
I drilled another hole in the right side. and painted it.
Here it's mounted up
Be sure and check your T1 and T2 wires which should be LOW and HIGH settings are wired to the Volvo relay.
Then be sure the 3rd wire from the Temp Switch is grounded properly.
Relays for sale
$25 plus shipping to the lower 48 states smittysmotorshop@rocketmail.com
LEDs low speed
High speed
complete setup mounted without fenders
close up of completed relay mounted
Bushing for the BMW temp switch. 1/2 MIP x 14MM female.
BMW Temp Switch Bushing 1 2" x 14mm | eBay
results for a Taurus 2 speed fan setup. Special thanks to Onovakind67 and
Aceshigh at NastyZ28.com for all of their work on this.
#1. You need 2 temp switches for 2 speeds.
Solution = BMW 91 / 99* C (180/195*F) dual temp switch Part #61311378073< $12 from Rock Auto - can't beat that.
One single temp switch instead of 2, just gotta drill and tap a brass adapter fitting to accept the M14 x1.5 thread.
#2. Heavy duty controller for 2 speeds. (Thanks Onovakind67)
94-97 850 Volvo vehicles used a heavy duty relay dual fan controller part # 1398845
Cooling fan relay for any 960, 940 92-95, 850 all, 740 92, S/V90 all, S/V 70 98-00, C70 Turbo 98-04.
92-95 960 and 940
98-00 S/V 70
98-04 C70 Turbo
92 740
S/V 90 All
850 All
Volvo Controller = $10-$20 Salvage yard or ~$50 new.
BMW Dual Temp Switch = $11
Make sure your alternator can handle the load. I switched to a 144amp unit
144amp alternator
Here's the simple schematic ,
You can optionally wire in 2 LED's so you know when each fan is on.
You don't want to interrupt the main batt wire to the volvo relay with the ignition relay. because you have now limited your hi amp volvo relay to 30-40amps. you want to interrupt the ground wire on the temp sensor.
85 ground
86 ignition
30 ground
87 to temp switch ground
87a nothing
this will allow the volvo to stay connected to the full power of the battery, and turn the fans off when the key is off
Okay guys/gals I have finally got all the parts with photos to help out further on this great thread.
#61318361787--BMW temp switch 180*/195*
#61311378073--BMW temp switch 195*/210*
#61131378412--BMW 90* angle connector
#61130007445--BMW 90* green connector wires 2 required
#61130007446--BMW 90* green/black connector wire for ground
#1398845--------VOLVO dual fan relay, sorry no info on connectors(YET) except for the wires coming out for the temp switch high/low. Mine were completely disintegrated so I ordered 2 new wire assemblies and stuck them in the old connector.
#3523813--------VOLVO white wire assembly for temp switch 2 required.
By the way the pack of aluminum washers is for the temp switch itself, my uncle who is a german car mechanic told me it is required to have an aluminum crush washer for leaks ? got it from local parts store for 3 bucks.
Brass hex head bushing, use for BMW temp sender. All you have to do is tap it with a 14mm x 1.5 tap. This brass fitting is short and no need to drill out just tap it.
Item #: 48938
HEX BUSHING 1/2X1/8"BRS
http://www.acefactorystore.com/proddetail.asp?prod=48938
Recap of my set up:
Stock radiator (new)
2 gals antifreeze + 2 gals water
Water Wetter
160* thermostat
BMW 195*/210* temp switch
Volvo Relay
2 speed Taurus fan
140 amp alternator
Finally fired up the motor. After timing I let it idle at 1500 rpm for 30 min. The thermostat opened at 160*, the fan kicked in at 195* the temp actually dropped and the fan cut off!! It cycled several times this way. Temp never went over 200*. High speed never cut on. This was in my garage 50*+ day. The alt. kept steady and the lights did not dim.
Using Ace's diagram I wired up the power outlet, cooling fan manual switch and the LEDs.
Low speed on
High speed on :crazy:
I found the bracket on a S10 firewall, I'm sure other Chevy's use the same bracket. I cut off one of the brackets.
I cut with the Dremel the lock tabs and the ears off of two brackets.
The brackets line up with the Volvo relay perfectly!! And lock on. You have another mount for the relay to switch the negative lead from the temp. sender.
Front view.
I drilled another hole in the right side. and painted it.
Here it's mounted up
Be sure and check your T1 and T2 wires which should be LOW and HIGH settings are wired to the Volvo relay.
Then be sure the 3rd wire from the Temp Switch is grounded properly.
Relays for sale
$25 plus shipping to the lower 48 states smittysmotorshop@rocketmail.com
LEDs low speed
High speed
complete setup mounted without fenders
close up of completed relay mounted
Bushing for the BMW temp switch. 1/2 MIP x 14MM female.
BMW Temp Switch Bushing 1 2" x 14mm | eBay