So maybe try this: low speed ON at 185... OFF at 180. If the coolant temperature is greater than 113°C, when the ignition is switched off, the relay is energised for The PCM will only turn ON’ the engine - 1500 kPa or coolant temp more than 108 C 400W and 430W Off - 1170 kPa or coolant temp less than 104 C Fan Motors Used Large / Small Fan Stage 2 On Gen 3, V8 only. approximately four minutes, this is known as Low Fan Run On. I also show how I tested my cooling fan switches. What should I set each fan at. Am i stupid or misconstruded . 329.00 AUD. This was a mediocre way of doing things, primarily because the current required to spin the fan was drawn through the switch itself. The sensor is crucial in the control of temperature based functions performed by the ECU (eg spark and fuel timing, instrumentation, etc). There is a BCM message response fault which will cause a PIM DTC B2002. or P01115 is set. Any suggestions please. Condition: ... GEN3 V8 LS1 5.7L . I assume the water temps would have still been higher with the original thermostat (assuming the same fan settings). Works great with the Spal Pulse-Width Fan Controller. All Rights Reserved. I had the fan settings changed at the same installed the 160 thermostat, so I could did not compare operating temperatures before and after the thermostat change (with the same fan settings). cooling fan high speed relay fan if the engine cooling fan low speed relay has been “ON” for two seconds As it dropped from 180 to 160° there was a significant difference. Only high speed comes on when its reached its temp. If relay 1 is bad, you will have no low speed operation at all, and fan 1 will not work on high. the fan off temp temp should be about 5 degrees colder then the on temp. The Nelson harness and LS1 fans (00' Camaro in my case) is a great setup, but I'm going to add a flex-a-lite #108 (pusher) to help things out. 12v switched wire to green wire at a/c clutch.   For two fans, I would add another relay. All cooling fans will be turned off in the vehicle speed is greater than 104 kph. I have a thermo fan in my Lc and am up to the stage of fitting a thermo fan temp switch to my 280hp 202. He checked all the replays and all was …   P01115 is set. Home›Forums›Technical – General›Driveline›ls1 engine temp and thermo fans. than 1170 kPa and the coolant temperature is less than 98°C. So you wanna set the low speed fan to come on a little higher than the opening temp of the t-stat. This video shows how an normally-open cooling fan switch works. so unfortuntly it's a one speed setup only. The engine coolant temperature is less than 102°C. Wiring Instructions: 1985-1989 B4P Option equipped Corvettes. Viewing 3 posts - 1 through 3 (of 3 total). Fan relay should be wired to be switched to earth by the ecu. If it opens later then the temp can not cool lower than the later opening temp. The t-stat is 180 degree btw. Details about Radiator Thermo Fan switch relay Temp Controller changeover Automobile headlight. the vehicle speed is less than 30 km/h. If the coolant temperature is greater than 113°C, when the ignition is switched off, the relay is energised for. If the low speed fan was OFF when the criteria was met to turn the high speed fan ON, the high speed fan will You must be logged in to reply to this topic. What temp range should I use?? I just got done with a 4.3 to 5.3 engine swap and with all of that, installed ls1 e-fan with a nelson e-fan harness and tune. are you suppose too? You have probably sorted this by now but in case you had wiring wrong the fan switch wires from the ecu switch to earth internally in the ecu so you wont get a relay signal. i Had my tuned by frost to 160 thermo but how do you change the fan temps? I bought a dual pass aluminum radiator that came with a single 1 speed fan. The switches will turn on the main fan, auxiliary fan or both at a lower temperature. 5th Generation Chevrolet Camaro 2010 - 2015. The cooling fan low speed relay will be turned OFF when any of the following conditions have been met: I realize alot of books refer to the stock LS1 thermostat as 180 but this is incorrect from my experiences. This topic contains 2 replies, has 3 voices, and was last updated by  dave 5 years, 6 months ago. The Fan on temp is about 8 degrees higher than where the thermostat will regulate. just woundering where other people put theirs. A couple of decades ago, it was popular to simply add a switch under the dash to control an electric cooling fan, often referred to as an auxiliary fan. 8. Available with 185° on/165° off or 195° on/175° off. Radiator Thermo Fan Temp CURRENT POWER Controller Switch 12V RELAY THERMOSTAT. Details about Radiator Thermo Fan Temp CURRENT POWER Controller Switch 12V RELAY THERMOSTAT. An engine coolant temperature sensor fault is detected and a DTC such as DTC P0177, P0188, P01114 or I keep the same radiator and running a stock 186 deg thermostat. Hello! 16-18 ga: all others.   Most of the parameters are stock from the 99 LS1, but the one thing I'm looking to change is the fan settings. The red wires connect to the power side of the fans, and the black wires will connect to the ground side of the fans. >ENGINE COOLING FAN HIGH SPEED The LS1 PCM has 2 fan outputs and I used fan #1 to control the electric water pump and fan #2 controls the 16" fan. The 16" fan is at the stock setting 190 on and 180 off. There are currently 1 users browsing this thread. Around town, the engine generally runs at about 175 degrees. The coolant temperature is greater than 98°C. The cooling fan relays are controlled by the Engine Control Module (ECM). Item information. For Ford … Item information ... Silicone Radiator Hose Kit for Holden Commodore VY Ute V8 5.7L LS1 2002 03 04 AU 99.00 AUD . If both the engine cooling fan relays are ON, the Cut the dark green /white wire at the inner fender well. ... as both the thermo fan setup for the V6 and aux A/C fan for … The stock LS1 fan setting is 190 on and 180 off. An A/C request is not indicated (NO) and the coolant temperature is less than 95°C. GMP has the solution. Switches the fan on at about 90 or 91 deg C and … The coolant temperature sensor is designed to respond to changes in engine coolant temperature. Sales and Group Purchases from our Great Sponsors! I know this because cruising along at 110km/h the fans aren't on and only ram air is cooling the radiator and hence you get a good guide on where the stat is working.   I will switch the earth on the thermo relay so will only need to use a single wire in the harness. come ON 5 seconds after the low speed fan is turned ON. Copyright © 2021 CommodoresPlus.   The stock C4 Corvette cooling system runs inherently hot. Hey everyone, so probably for the past 2 months ive been having a problem with the temp sensor and im curious to see what you all think. Not sure on the Holden V8 motors, but the LS1 thermostat opens fully at 92c, and the thermo fans come on at 102. Hi.   If relay 2 is bad, both fans will work on low speed, but fan 2 will not work on high. For the electric water pump I initially had it set at 170 on and 160 off. In stop and go driving I'm having to use the A/C to "force" both fans to 100% to help bring the temp back down. Thinking of putting Oil Temp & Trans Temp gauges. If relay 3 is bad, both fans will work on low speed, but fan 1 will not work on high. Trying to find out how these LS1 thermo fans work. I have a Weiand Xcelerator inlet manifold. What is the thread type used on Holden 308's? hey people having a small issue with my thermo fans ive wired my fan relay in correct for my ls conversion but when i run the car i cant get the thermos to kick on and im geting no relay signal from the pcm what temperature are ls1 thermos meant to come on at. 8-10 ga: fan power and ground. PCM will turn OFF the high speed relay when: ENGINE COOLING FAN LOW SPEED Radiator Thermo Fan switch relay Temp Controller changeover Automobile headlight. G/day wjr2980 I'm running a 1985 KC LASER Thermo switch in my 202. note: or in an ’84 to ‘89 240 you may use the a/c power ‘on’ wire: red/white wire at ac switch microswitch in dash. my fan seems to stay on a lot and truck only runs 160. and the following conditions are satisfied. The higher temps allow the engine to run more cleanly (better emissions), but a slightly lower temp is better for engine wear and performance. fan comes on at 100 and the lag of coolant allows the engine to spike at about 104. i set mine at 97 on … Route the 2 groups of 12 gauge wires labeled “Fan #1/Low” and “Fan #2/High” from the relay to the electric fan motors. 1985-1996 Corvette Low Temp Cooling Fan Control Switch would be installed in this location (driver’s side cylinder head between cylinders 1 and 3). Like I said … switch on at 85'c or 90'c??? The coolant temperature is greater than 98°C.   A/C request not indicated (NO). I have a VX 3.8 on LPG injection, with cool air pack which includes an 82 degree thermostat in place of the 96 degree version. For Nissan Gu Patrol Y61 Petrol TB45E 4.5L 97-01 . LS1 VN + WK Grange 0010 + HPW VX SS ... although there is a fuction setup in the 808 delco's for a second temp to kick a fan into high speed, the 808 is only wired for one output (for thermo fan) in the VN-VR. They actually crack open around 172 degrees or so,,,,and operate in the 175 range. This easy to use cooling fan relay kit includes a labeled wiring harness, 40 amp relay, fuse holder and coolant sensor. optional 2nd relay overrides temp switch and turns on fan when a/c is turned on fan adjustable fan … Using the fan schematic on my website, you can look at various points in the fan relay control circuits (blue and green wires from the PCM to the relays) for a ground when the fans are supposed to be on. So some where in the 175 to 185 degree range. The A/C request indicated (YES) and either: The engine cooling fan high speed relay is controlled by the PCM. Two Fans, 1 on at lower temp, other comes on at higher temp: GM LT1 early: Two fans, both at 6 volts at lower temp, full 12 with higher temp switch trips: GM LT1 later: Version from LS1tech: Here is a basic fan setup. (0 members and 1 guests). Only need to use a single 1 speed fan na set the low speed relay controlled! 160 off the … Hello the fans turn on and as it get 's hotter I do n't see hear... Will cause a PIM DTC B2002 where I pulled the electric water pump from!: I am not in the … Hello with a single 1 speed.. Or 195° on/175° off single wire in the … Hello energised for the switches will on! Of the parameters are stock from the 99 LS1, but the thing... You had a fan switch relay temp Controller changeover Automobile headlight n't see or hear a in. 99.00 AUD will switch the earth on the freeway, the cooling fan switches engine coolant temperature sensor is... Reach 190 degrees cars I 've seen even regulate to about 88c comes on when its reached temp. 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'' fan is at the inner fender well was last updated by dave 5 years, months... 180 but this is known as low fan Run on one speed setup only ( )! Switch with LEDs ( or just fan status if you put a cooler thermo in then on!