DrewBrews

Noob here, radiator fan not working, how do you jump a fan switch? which holes to connect?

Dc4LsTeG

iTrader: (7)

Why don't you search before you keep posting all these threads with stuff that's been covered many times

Dc4LsTeG

iTrader: (7)

Unplug sensor on thermostat and put a wire in the plug

cetcivic

once u do jump the switch,you'll have to disconnect power whenever u shut off the car..good luck

HondaPartsHero

I'm pretty sure the fan switch is switched 12v not battery voltage do it'll shut off with the car.

TheRealTegger

Why don't you just fix it properly?

What year and model Integra?

DrewBrews

its a civic with a ls swap. b18b.

TheRealTegger

OK then, what year Civic? What year B18B? What year ECU? What wiring-harness has been used? And A/C or no A/C?

I ask these questions because there is more than one fan-switch system.

DrewBrews

its the fan switch connected to thermostat. im trying to jump that. No a/c 94 eg 98 ls probably obd2

TheRealTegger

You're not supposed to jump that. That turns on by itself at 200F.

Set your multimeter to DC volts. Turn the ignition key to "II". Now see if the colored wire (not the black one) has voltage to ground. If NOT, check for a blown 7.5 amp fuse in the under-dash fuse box.

With the connector unplugged, and with multimeter set to ohms, check to see if the black wire has continuity to ground. If NOT, then the fan relay can't close.

lunalink

use blowtorch

B20ztek

iTrader: (1)

your cars obd1..

alldayda9

i think autozone sells fan switches for like $30 or sumthin..... the only time i do the jump is if im at the track.

http://www.autozone.com/autozone/par..._176020_11944_

DrewBrews

just did it. fan didn't come on. so im guessin the fan is broken?

standy xsi

"if not then the fan rely can't close"

then that means relay buggerd?

TheRealTegger

You can "guess" if you like, or you can do the job properly.

Did you have the ignition key turned to "II" before you jumped the wires inside the connector?

TheRealTegger

Unlikely at this point. Remember this is a vehicle with an engine-swap; there is a high probability of wiring problems.

The fan relay is closed (carries current to the motor) when the fan switch closes. The fan switch is the one on the thermostat housing.

Once the relay closes, current flows to the fan motor and then to ground. There are several fuses and connectors in between.