my car was running hot unless i had the heat cranking, then it would coem back down to half way

just had them put in a new radiator

now it seems MORE sensative to wether im moving or stopped

so my fans never come on i have noticed.

but when i got the car, after i shut it off, one of them would flicker on and off, intermitantly...

so now they dont work at all, i swapped the relay with the one next to it which si the same thing, and still no fan action.

so if its not the relay, radiator, it must be the actual motors in teh fans are blown???

help! thanks!

 

It is the sending unit on the thermostat housing. The same thing happened to my 93 eg couple of mos ago.

 

awsome is this something i can just go pick up at the dealer or something?

what do i do?

 

Turning on the a/c will bypass the sensor/relay function: both fans should turn on. If they don't, test them directly. IE battery power to one side & ground the other. It should run. If not....... ****-can that bad boy

P

 

sooo anyone selling some fans? lo l

 

man u r jumping all over here,,,,,,,,,before u do any more replacing and **** money away do some diagnostic work,,,

did u try the test P- suggested??? ...if both fans work when a/c is on, fuse, relay, wiring is ok,,,,,,,start the engine make sure t-stat opens properly ,if it does not replace t-stat ,,, if it does and fans still do not come on and they were working with a/c on, then like the first guy said, there is a fan switch located on the t-stat housing, disconnect it, jump the wires together if both fans come on u got a bad switch, by the way car running or key on the start position to do the test..

 

fans dont work with the AC test or anything else for that matter, fans are plugged in, one of them used to come on intermittantly after the car was shut off, but now nothing at all

 

If all the fuses chk good (after all this poking and prodding), do as I suggested and go directly from the battery to the fan motors with two jumper leads of 10 gauge wire or heavier.
What I'm trying to determine is if it's the motors (most likely) or their control systems. If you've got good motors (they respond to direct battery voltage), we look at the control system. If they don't respond, you know where to start.....

P

 

can i get these lil jumpers at like any auto parts chain store? thanks for the tips!

 

Make up a set for your tool box.
Two lengths of wire (the longer, the better) and four alligator clips. They're great for verifying wire breaks, component testing and saved me a lot of time on Flat-rate electrical repairs.
On one set, I fashioned multi-connector ends with one alligator clip, a pin probe and a 1/4" eyelet each. Soldered it all up, sealed with shrink tubing and used over-sized shrink tubing lengths to insulate the unused connectors.
Worked out well, and covered 90% of whatever I was presented with.

P

 

would it matter if the fans dont turn on if im driving on the highway? becuase they dont turn on, and my car still overheats on the highway.

i felt the upper radiator hose and its hot, so that rules out the thermostat being stuck shut right?

 

Usually there is enough air flow through the radiator at speed that the car keeps from overheating. Overheating while moving is usually indicative of either no circulation (coolant) or insufficient coolant in the system.
These can be caused by:
1) Thermostat stuck shut
2) System is airbound (Bubble) and there is insufficient coolant to circulate.

Try two things:
a) Engine cold: Start Engine with Radiator cap off. Within several minutes you should note a moment where the coolant drops in level, and starts squirting from the cross tubes (The T'Stat just Opened). If it doesn't do this but goes straight to immitating Mt Visuvius, the T'Stat is Garbage.
b)Engine cold: Raise fron of car at least a foot and refill radiator. If you can add a significant amount of coolant, the system was airbound. By raising the nose, you insured that the radiator was the highest point in the system.

P

I would still have the fan issue addressed (seriously)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snarcher! &raquo;</TD></TR><TR><TD CLASS="quote">would it matter if the fans dont turn on if im driving on the highway? becuase they dont turn on, and my car still overheats on the highway.

i felt the upper radiator hose and its hot, so that rules out the thermostat being stuck shut right?</TD></TR></TABLE>

the t-stat is on the lower rad hose ,, u need to feel it and make sure it is hot almost as much as the top ,, if it is warm , lukewarm, cold, then t-stat is stuck close.......if t-stat does not open coolant will not circulate properly thus the fans will not come on,,,, now u also said the fans do not work with a/c on so u got fan issues for sure ,,, do as p-said, apply power and ground to fan motor and see if fans come on if they don't u got bad fan motors ,,,,,,,,,,,,try a quick thing, start car put a/c on , fans dont work right?? hit the back side of the fan motor see if they come on ,,if they do u got bad motor if they dont try P adams suggestions ,,try this and post results

 

First thing I'm going to ask is if you have bled the cooling system?

 

Hense my suggestion to raise the nose and refill.

P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by P_Adams &raquo;</TD></TR><TR><TD CLASS="quote">Hense my suggestion to raise the nose and refill.

P</TD></TR></TABLE>

Didn't see that .

I believe f series motors and b series along with h series have a bleeder valve near/on the t-stat housing.

Just open that up upon cold start up and let it remain open until you get radiator fluid (incase you can't jack up your car) .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by .ken &raquo;</TD></TR><TR><TD CLASS="quote">First thing I'm going to ask is if you have bled the cooling system?</TD></TR></TABLE>


What he said otherwise check water pump and thermostat for proper operation.

 

no circulation sounds like it makes the most sence

coolant was changed 2 days ago when they put in new radiator

so ill change the thermostat, but also

waht sensors/sending unit/relays etc should i also replace? ill goto the dealer and pick them all up if u can just give me a short list,

you guys rock!!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snarcher! &raquo;</TD></TR><TR><TD CLASS="quote">no circulation sounds like it makes the most sence

coolant was changed 2 days ago when they put in new radiator

so ill change the thermostat, but also

waht sensors/sending unit/relays etc should i also replace? ill goto the dealer and pick them all up if u can just give me a short list,

you guys rock!!!! </TD></TR></TABLE>

man dont just replace all the parts parts, diagnose the problem and replace only what is needed ..

have u diagnosed like we adviced?? ...or do u have extra money and want to replace all the parts and hope that 1 fixes it..??

 

well im gonna do the thermostat first, but i mean how much can those relays and sensors really cost???

 

Thats why I suggested testing THE MOST EXPENSIVE COMPONENTS first.
Don't start about cost until you know what you're looking to replace!
I will not be a party to someone throwing money at a problem indiscriminately.
You've had all manner of people making suggestions.. Check something.

Just because it was worked on last few days, doesn't mean something wasn't overlooked. We've all done that before. That's what going back and re-checking is all about.

P

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by snarcher! &raquo;</TD></TR><TR><TD CLASS="quote">well im gonna do the thermostat first, but i mean how much can those relays and sensors really cost???</TD></TR></TABLE>

BLEED THE SYSTEM first. This is probably THE number 1 thing that people don't do correctly then they start dishing out more money on a new t-stat when it wasn't bad in the first place. If you find out that the system was bled properly then and only then start looking at other components.