Repair and disassembly guides for the tenth generation Ford Thunderbird.

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Cooling fan not working

97 ford thunderbird

We've replaced temp sensor. Thermostat. Ccrm with used one from auto salvage. Checked wiring. Checked fuses. Jumped fan off battery and worked. What else could it be? Please

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4 Answers

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Teresa ( @poojer ) by the climate control do you mean the air conditioner . There is an inline fuse between the PCM and the fans near the IRCM which house the relays @oldturkey03 was referring to . If the inline fuse blows then the whole system screws up because the information coming from the PCM is no longer available . The PCM tell when the temp in the car is high or if the air conditioner is on and relays the message to the fan . This wiring diagram could be helpful As for the issue with the blower motor running only on full thats the fan resistor that needs to be replaced . This is done like this This is for a ford taurus but there very similar in this area. Hope this helps

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replaced resistor already with used one from salvage yard that didn't work. had to remove inline fuse to stop blower motor. fuse looks fine. the fan wouldn't work at all if the fuse was bad would it? why would the fan work if the climate control has been removed?

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replace the resistor with a new one as for the fuse test it for continuity it can look fine and still be blown

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@poojer Just to clarify things for me the fans your talking about are the engine cooling fan mounted on the radiator or the blower for the HVAC or both

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@poojer there should be a fan relay. You do need to check that as well. Let us know what engine size your T-Bird has

Update (09/29/2017)

From teh repair CD on how to test the fan:

4.6L, OBD-II:

X240 ELECTRIC COOLING FAN CONCERN: DID THE FAN OPERATE AT ANY SPEED?

Note: For the proper results of these pinpoint tests, no fault DTCs must have been present during EEC-V Quick Test.

For one speed fan applications (Mustang), GO directly to X241 .

During the operational check of both fan speeds, did the fan operate at any speed?

Yes

Only one fan speed is operational. GO to X250 .

No

Cooling fan will not operate at any speed. GO to X241 .

X241 COOLING FAN WILL NOT OPERATE AT ANY SPEED: COMMAND FAN ON (HIGH SPEED FOR TWO SPEED APPLICATIONS) AND CHECK FOR VOLTAGE AT FAN

Scan Tool connected.

Key on, engine off.

Still in Output Test Mode, with fan commanded off.

Disconnect cooling fan (either one for Windstar).

Command fan on (high speed for two speed fan applications).

Measure voltage between the Power-To-(High Speed) Fan circuit at the cooling fan vehicle harness connector and chassis ground.

Key off.

Was voltage greater than 10.0 volts?

Yes

Power is being supplied to fan. GO to X245 .

No

GO to X242 .

X242 CHECK FOR B(+) TO FAN RELAYS IN CCRM

Key off.

Cooling fan disconnected.

Disconnect CCRM.

Connect negative probe of DVOM to the battery negative post.

For Mustang, Thunderbird/Cougar:

Check voltage at pins 3 and 4 of the CCRM vehicle harness connector.

For Continental:

Check voltage at pins 3, 4, 8 and 10 of the CCRM vehicle harness connector.

For Windstar:

Check voltage at pins 1, 2, 6, 7, 12 and 24 of the CCRM vehicle harness connector.

Is each voltage greater than 10.0 volts?

Yes

GO to X243 .

No

B(+) fault. CHECK condition of related fuses/fuse links. If OK, SERVICE open circuit. If fuse/fuse link is damaged, CHECK B(+) circuit for short to ground before replacing.

For Continental:

If open was to only CCRM pins 3 and 4, after service, GO to X272 (to check both HFC relays in CCRM and Power-To-Fan circuit). Otherwise, RECONNECT all components. RE-EVALUATE symptom.

For Windstar:

If open was only to CCRM pins 1, 2, 6 and 7, after service, GO to X272 (to check both HFC relays in CCRM and Power-To-Fan circuit). Otherwise, RECONNECT all components. RE-EVALUATE symptom.

All others:

RECONNECT all components. RE-EVALUATE symptom.

X243 CHECK POWER-TO-FAN(S) CIRCUIT CONTINUITY BETWEEN CCRM AND COOLING FAN(S)

Key off.

CCRM disconnected.

Cooling fan disconnected.

For Mustang:

Measure resistance between pin 2 of the CCRM vehicle harness connector and the Power-To-Fan circuit at the fan vehicle harness connector.

For Thunderbird/Cougar:

Measure resistance between pin 6 of the CCRM vehicle harness connector and the Power-To-High Fan circuit at the fan vehicle harness connector.

Measure resistance between Pin 2 of the CCRM vehicle harness connector and the Power-To-Low circuit at the fan vehicle harness connector.

For Continental:

Measure resistance between the Power-To-High Fan circuit at the fan vehicle harness connector and Pins 2 and 12 of the CCRM vehicle harness connector.

Measure resistance between Pin 6 of the CCRM vehicle harness connector and the Power-To-Low Fan circuit at the fan vehicle harness connector.

For Windstar:

Measure resistance between the Power-To-Fan circuit at the fan vehicle harness connector and Pins 4 and 8 of the CCRM vehicle harness connector.

Is each resistance less than 5.0 ohms?

Yes

REPLACE CCRM. RECONNECT all components. RE-EVALUATE symptom.

No

SERVICE open Power-To-Fan circuits(s).

For Continental:

After service, GO to X273 (to check both HFC relays in CCRM).

For Windstar:

If open was just between CCRM Pin 4 and the fan, after service GO to X273 (to check both HFC relays in CCRM). Otherwise, RECONNECT all components and RE-EVALUATE symptom.

All others:

RECONNECT all components and RE-EVALUATE symptom.

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4.6.l engine size. Which ones are you talking about? Got used ccrm and used integrated control module. That did not help. The climate control went out and the blower run wide open. Does that have anything to do with the coolant fan? Why is this such a mystery? Seems to be alot of people with the same problem. But no answers.

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Does your AC work? There is a high-amp fuse in the engine compartment fuse box that supplies both the fan and the AC compressor clutch. See if that fuse is showing continuity

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ok to be clear. so the heater fan runs wide open and the coolant fan doesn't run at all. weve checked the inline fuse for the heater fan. and checked all 60a fuses that we thought applied to ccrm with a multimeter and checked the fuse box also. are there any other fuses that we are missing. the ac went out along time ago. now the whole climate control has went out. before the climate control only worked parttime. but only the heater part. also the blinkers only worked part time and dash lights. now no dash lights at all. is it a coincidence that all this is happening at once or all connected somehow?

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The cooling fan is connected to the same fuse as the AC compressor clutch. You need to check this. Even so you may not have AC anymore the fuse must still be working for the cooling fan to work.

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Im not an expert but I own a 1996 Mercury Cougar. I have similar problems which I can't find a solution. It started with dome light then trunk light then cruise control then brake lights then coolant fan. I've changed out the ccrm and that helped some of the problems for a short time. I rewired the brake and turn signals and dome lights. I think it all started from jumping another car and hooking the leads up straight. To me its has to be in the control module since it controls the multiple devices. If I ever find the solution I'll pass it on. Still I agree with you on the amount of people with these similar problems have not found someone with the right answer.

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I have 88 Thunderbird Coupe Base & the blower fan went out last week !!! Checked the fuse block panel & fuse #9 30 A green was melted in fuse block so badly it looked like a gummy bear !!! Everything else works fine but digital dash, stereo & courtesy lights but they need wiring !!! I can't find a new fuse block anywhere & I got inline fuse holder & was thinking about pulling those two gray wires & doing a vasectomy of the two so to speak !!! Snip, Snip & put in fuse holder !!! I have diabetes & hypothyroidism so an blower for A.C. is vital !!! Help anyone !!!

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Teresa Bishop will be eternally grateful.
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