i swaped from 305 tbi to 350 carb now the electric fan does not run looking for a little help if some one could tell me were the fan relay is located that would be a big help thanks

 

The relay is next to your master cylinder, right next to the fuel pump relay on the bulk head.

 

thanks is it the right side one or left what would make it not run any ideas

 

Parts on a car are referred to right or left as you are sitting in the car. The relay is on your left side.

 

Did you reinstall the single wire coolant temperature sensor back in the rh cylinder head after the swap ?

 

 

As you can see in the schematic pretty simple. When the green/wht wire is grounded via the cylinder head temp sensor power from the starter junction goes through the relay to the fan. The Splice shown on the brown wire goes to the alternator. Turn the key to run and check to see if you have power on the brown wire. Ground the green and white wire see if the fan goes on. if not move on to see if you have power at the relay on the red wire. Followed bye grounding the green/white wire to see if power comes out the red/blk wire of the relay.

 

yes i put the sensor in i put a brand new one in and i also put the one back in on the intake manifold

 

what controls the gauge i thought the one in the head was for the gauge

 

The left head between cyl 1,3 is for the gauge. The cts for the ecm is in the intake and the fan switch is in the rh head between cyl 6,8.

 

o ok i got ya so i didnt put the sensor back in i have older heads off a 72 350 so ill have to find the wire its a single gr/wht wire i had a sensor right in the water jacket on the block drian on that side would that be the sensor for the fan ill check the old head though might have over looked it thanks alot

 

The block drain is 1/4 npt the coolant switch will not thread in without a adapter I believe it is 3/8 npt. It could even be 1/2 npt I cant recall.