![]() |
|
![]() |
#1 |
Registered User
Join Date: Jan 2013
Location: Saint Amant Louisiana
Posts: 18
|
Electric fan wiring
Wired up electric fan and it works fine. Problem is my temperature gauge is not working. I have an idea why. I spliced the wire from the fan that goes to the temperature sender in with the wire that goes to my temperature gauge. Is there a way to get my gauge working?
|
![]() |
![]() |
![]() |
#2 | |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,700
|
Re: Electric fan wiring
Quote:
https://www.summitracing.com/parts/der-16759 |
|
![]() |
![]() |
![]() |
#3 |
Senior Member
![]() Join Date: Nov 2018
Location: Waterford California
Posts: 2,526
|
Re: Electric fan wiring
Have no idea about your gauge as far as if it's still going to work. I'd try a new temp sender first. You need a different type of sender for the fan trigger and it should trigger a relay other wise you'll burn it up using it as a fan motor ground, too many amps required.
Also don't know how you wired your fan either but here is the proper way. I use a 40 amp auto reset fuse and one for each fan if multiples |
![]() |
![]() |
![]() |
#4 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
|
![]()
I assume you used the sender for a ground wire to the fan. If so it want work for the gauge to.
I would go to the parts store and buy one of the adjustable termostatic controllers and run it off that. That is the simplest way. This is a standard kit. You can buy them with relays also. They have some as much $200.00 if you want them. I just buy this kit and a relay to hook up in mine. I add a speed switch also to mine to cut the fans off when I'm at road speed. No need to run the fans when you don't need them. ![]() ![]()
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
![]() |
![]() |
![]() |
#5 | |
Senior Member
![]() ![]() Join Date: Oct 2014
Location: Eagle, ID
Posts: 3,005
|
Re: Electric fan wiring
I have one of these on my truck. The only thing I do not like about it, it that it runs after the truck has been turned off. Is there a way to stop that from occurring?
Quote:
|
|
![]() |
![]() |
![]() |
#6 | |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
|
![]() Quote:
Yes, depending on how you have it wired. If it keeps running after the truck is turned off you have it straight wired to 12 volts. If it runs 12 volts straight off the battery you will need to put either a on/off switch in line at the dash area so you can shut it off but that sometimes isn't good enough because you forget to shut it off. With a relay that shuts power off with the key switch is the best. Just cut the truck off and it will cut off. When you crank it up it want come on until the temperature is reached by the adjustable thermastat.
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. Last edited by Andy4639; 02-14-2021 at 09:11 PM. |
|
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Jan 2013
Location: Saint Amant Louisiana
Posts: 18
|
Re: Electric fan wiring
I plan on calling champion radiator tommorow and see what they recommend. I've called them once already and the costumer service was great. I'll update after I speak to them.
|
![]() |
![]() |
![]() |
#8 | |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,137
|
Re: Electric fan wiring
Quote:
The fan needs to have a temperature switch to operate correctly. Ie a switch that operates at a certain temperature. Hooking the fan directly to the sender just makes the fan run slower. It won't turn the fan on and off based on engine temperature. There isn't any reasonable method of using the temperature sender to turn the fan on and off. The temperature switch that was used on the idiot lights is the right kind of switch but the temperature switch set point is too high to operate cooling fans.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
|
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,151
|
Re: Electric fan wiring
For a single speed fan I would just put a 180 or so sensor (like Cole-Hersey 84251) in the intake if you have aftermarket intake or RH head if you have stock intake (that plug can be a pain to remove) or water neck. Use that signal to ground a relay. So on a 70A Bosch type relay (Cole-Hersey RA700112DN-BX), battery hot to 30 , fan hot to 87, ground from the sensor to 85, and ignition switched to 86. So if the coolant is hotter than the switch and ignition is on then the fan runs.
For a 2-speed fan I use a BMW switch in intake, water neck, or head as above. BMW p/n 61318361787 is 180 low and 195 degrees for high speed. Use a Volvo relay (1398845) to control high and low speeds. Both of these have unique plugs so you are better to buy used and get plug and relay or sensor. I add a main relay so it does not run with ignition off. On a 70A Bosch type relay (Cole-Hersey RA700112DN-BX), battery hot to 30 , Volvo relay hot to 87, ground to 85, and ignition switched to 86. Then Volvo relay LH 1 to fan low speed and LH 2 to high speed. Then Volvo relay Center 1 to the low side of the BMW switch and Center 2 to the high speed side. BMW switch if you are looking at the pins with the flat side down, then ground goes to 12, low at 9 and high at 3 o'clock. So if the coolant is hotter than 180 and ignition is on then the fan runs on low. If the coolant is hotter than 195 and ignition is on then the fan runs on high. Note that the BMW switch is M14x1.5 thread. I bought a 3/8 to ¼ bushing and drilled and tapped it M14. Also note that you should use a fuse or circuit breaker on the power supply to the relay for protection.
__________________
'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project Last edited by MARKDTN; 02-15-2021 at 02:17 PM. |
![]() |
![]() |
![]() |
#10 |
Registered User
Join Date: Jan 2009
Location: colorado springs
Posts: 479
|
Re: Electric fan wiring
Another option is to remove the radiator drain plug and install the sending unit in its place. That’s what I did , works great.
|
![]() |
![]() |
![]() |
#11 |
Registered User
Join Date: May 2018
Location: Prattville, AL
Posts: 608
|
Re: Electric fan wiring
Thanks for the idea fdbdw. I am just about to the point where I will need to hook up my fan. I went with a electronic gauges and electric fan so I have the same dilemma two sensor fighting over the same hole. So this is a good second option to the radiator probe route.
__________________
-------------------------------------------------------- 1967 C10 "Snowball" (Currently in a thousand pieces down from a bazillion) 1989 Toyota DLX pickup "The Hulk" |
![]() |
![]() |
![]() |
#12 |
Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
|
Re: Electric fan wiring
I'm using the dual fan relay kit from Champion. They have a single fan kit too. I didn't use their sending unit for the intake tho, I bought a different one that goes in the rad. Also have a zinc anode in the rad drain plug as well.
https://www.championradiators.com/dual-fan-relay-kit
__________________
72 C10 lwb fleetside -stock 350/350 combo |
![]() |
![]() |
![]() |
#13 |
Registered User
![]() Join Date: Sep 2001
Location: Cumming, GA
Posts: 470
|
Re: Electric fan wiring
In modern cars the fan will continue to run for a short period even after ignition is turned off, has anyone seen a relay kit that will do that without running the fan so long that the battery is drained? If so that would seem good for cooling. I notice that immediately after the engine is cut, temperatures in the radiator rise rapidly.
|
![]() |
![]() |
![]() |
#14 | |
Senior Member
![]() Join Date: Nov 2018
Location: Waterford California
Posts: 2,526
|
Re: Electric fan wiring
Quote:
|
|
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,151
|
Re: Electric fan wiring
Hella 996152131 - Hella Adjustable Time Delay Units appear to fit a regular Hella/Bosch style base. They are rated at 20A so not enough to run a big fan, they would have to be added and used to trigger the larger relay. So in my description above, the new relay would be battery (fused) hot to 30 terminal, ignition switched power to 86, ground to 85, and out to the ignition (86) on the big 70A relay from 87. That way the ignition supply would have a delay of whatever you programmed the relay for.
__________________
'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project Last edited by MARKDTN; 03-25-2021 at 09:02 AM. |
![]() |
![]() |
![]() |
Bookmarks |
|
|