Question about 2000 Ford Excursion

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Blower circiut has power on relay terminal 85 even when key is off. significant battery draw

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  • digadedawg Jul 03, 2009

    so if it still has power then what



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Inside the hood fuse box the relay is located take for over night and see if you there is still a voltage draw replace

Posted on Jul 01, 2009


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1 Answer

Starter does not engage when key is turned to start

assuming battery fully charged hook test lite between good groud and small starter terminal have somebody to crank if lits chek power and ground to starter and replace starter if no lit go to starter relay terminal 30 and 87 use a piece off wire and momentarily bridge them if starter bumps the engine check terminals 85 86 one is power when cranking the other is ground if starter bumps and test lit hooked to 85 86 lits replace relay if no lite keep tracing ckt to ignition switch

Dec 09, 2013 | 1999 Chevrolet Silverado 1500

1 Answer

My heater/air conditioning fan stopped blowing. Checked fuses, they are fine. No power to fan.

cooling fan relay could be bad,check relay by making a fuse jumper wire.look at the relay control circuits on relay look for control circuits terminal number 85 and terminal 86 hook fuse jumper wire terminal 85 on relay to good ground and take terminal 86 on relay hook up a jumper wire touch battery positive terminal relay should click if not, relay bad.

Sep 08, 2012 | 1995 Buick LeSabre

1 Answer

I have check engine error codes 11, 12 on my 95 grand cherokee limited the engine wont start just keeps turning over

Code 11 means no distributor reference signal detected during cranking. Check the circuit between the Distributor and PCM (computer). Also, keep in mind the following operations/tests apply to these relays only: Automatic Shutdown (ASD) , Fuel Pump and Ballast Bypass. For operations/tests on all other relays refer to the appropriate test.

The relay terminal numbers can be found on the bottom of the relay.
Terminal number 30 is connected to battery voltage and can be switched or B + (hot) at all times.
Terminal number 87A is connected (a circuit is formed) to terminal 30 in the de-energized (normally OFF) position.
Terminal number 87 is connected (a circuit is formed) to terminal 30 in the energized (ON) position. Terminal number 87 then supplies battery voltage to the component being operated.
Terminal number 86 is connected to a switched power source.
Terminal number 85 is grounded by the Engine Controller.

Remove relay before testing.
Using an ohmmeter, perform a resistance test between terminals 85 and 86. Resistance value (ohms) should be 75 ±5 ohms for resistor equipped relays.
Connect the ohmmeter between terminals number 87A and 30. Continuity should be present at this time.
Connect the ohmmeter between terminals number 87 and 30. Continuity should not be present at this time.
Use a set of jumper wires (16 gauge or smaller). Connect one jumper wire between terminal number 85 (on the relay) to the ground side (-) of a 12 Volt power source.
Attach the other jumper wire to the positive side (+) of a 12V power source. Do not connect the jumper wire to relay at this time.

CAUTION: Do not allow the ohmmeter to contact terminals 85 or 86 during these tests. Damage to ohmmeter may result.

Attach the other jumper wire (12V +) to terminal number 86. This will activate the relay. Continuity should now be present between terminals number 87 and 30. Continuity should not be present between terminals number 87A and 30.
Disconnect jumper wires from relay and 12 Volt power source.

If continuity or resistance tests did not pass replace relay. The Powertrain Control Module (PCM) and connector are located in the engine compartment, mounted to the inner fender, next to the air cleaner housing (click image fo zoom).
DTC 11 - No reference signal during engine cranking. No camshaft reference signal was detected during engine cranking.
DTC 12 - Battery disconnect. Battery input to PCM disconnected during last 50 key starts.
DTC 42 - ASD relay control circuit. An open or shorted condition detected in the auto shut down relay circuit.


Hope helps.

Jun 06, 2011 | Jeep Grand Cherokee Cars & Trucks

2 Answers

Heater motor does not blow

I suggest that you start by checking the fuse labeled HVAC 30A in the engine compartment fuse box. If the fuse is good, then check the blower relay for functionality by listening for a click while an assistant switches the blower on and off. The relay should be in the engine compartment fuse/relay box. If the relay appears to be working then check the blower motor resistor unit. Using an ohmmeter test the resistance between the DK BLU wire terminal C, and the LT BLU wire terminal A the reading should be around .26 ohms. Between the LT BLU wire terminal A, and the TAN wire terminal C the reading should be 2.1 ohms. And between the BRN wire terminal B, and the TAN wire terminal C the reading should be .71 ohms. If the readings are significantly different then replace the resistor unit. The attached drawings show the possible locations of the resistor assembly. If all of these things check out then either the control switch, or wiring are faulty, or the blower motor is bad.



Feb 11, 2011 | 1999 Chevrolet S-10 Pickup

1 Answer

It has no power to coil and the voltage to the tps and iat and temp sensors is to high 5.4 volts allready replaced the pcm

Check the (automatic shutdown relay) in the power distribution center for power when the key is in the on position. It controls the power to the coil,fuel pump,injectors,oxygen sensor. To check the relay, remove it from the panel. check the location of #30 corresponding to location of pin on relay. using a test light check to see if you have power on panel. Should have voltage, then check #86 on panel with the key on. It should have power. If no power then check for a blown fuse. Connect an ohm meter to the relay on terminal 86 and 85 and check the resistance. there should be 75 ohms resistance. Then check for continuity between terminals 30 and 87. There should be no continuity. Using jumper wires connect battery voltage to terminal 86 and ground terminal 85 to verify that there is continuity between terminals 87 and 30. If there isn't, replace the relay. Hope this will help you.

May 15, 2010 | 1996 Dodge Ram

1 Answer

Where is the horn relay located found fuse horn will not cut off unless u take fuse out drawing down battery trying to check to see if relay bad cannot find it

The horn relay is located under the hood with the fuses. look inside the lid when you remove it from the fuse/relay box and it will tell you where the relay is located. To test the relay use an ohm meter and connect one end to 87a and the other end of meter to 30. there should show continuity. then check between 87 and 30 and there should be no continuity. if all of this checks out then check resistance between terminals 85 and 86. It should read 70/80 ohms. if not replace relay. If it shows good then connect a jumper wire between battery positive terminal to 86 and a ground jumper to 85 terminal. You should hear a click or clicking sound. If not replace relay. hope this will help you.

May 11, 2010 | 2004 Dodge Ram 1500

1 Answer

I have a 2000 expedition with a relay clicking like crazy under the steering column and noticed with the key in the off position the heater blower still has power. It is killing the battery. please advise

With the relay connectected check the back it is either a 4 or 5 prong terminal 30 is battery volt 85 or 86 is ground if 85 is ground 86 will have battery volt 87 is power going to load such as blower motor the ground should be 0.05 or lower trace it back to problem or if 87 has low battery volt it could be the relay contacts inside

Feb 23, 2010 | 2000 Ford Expedition

1 Answer

My 98 jeep grand cherokee wont start. It doesnt even click or turn over. battery is fine, headlights, dome lights, all go on. Radio doesnt work with ignition on. I checked ALL the fuses, I replaced the...

fuse 8 40a supplies power to starter relay and ignition switch, to close the starter solenoid and engage the starter which draws directly from the battery. check to see that the starter relay is closing, if not ensure that the park neutral switch is not faulty (open circuit), it provides path to close relay (ground side) on the 85 - 86 terminals. if the starter relay does not close the starter will not run. if you have a spare relay swap out the relay for a quick fix attempt. hope this helps

Jan 28, 2010 | 1998 Jeep Cherokee

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