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While working on the overhead console in my 2004 Explorer, I

Customer Question
inadvertently shorted out the dome...
While working on the overhead console in my 2004 Explorer, I inadvertently shorted out the dome like resulting in a loss of significant component functionality. The car runs, but I have no interior lights, instruments, radio, climate control, power windows, moon roof, etc. I do have headlights, tail lights, turn signals, power seats, windshield wipers, etc.
I've checked individual fuses both under the dash and under the hood and everything tests out OK with my continuity tester.
Currently looking for a wiring diagram to get more clues like some kind of sub-panel fuse or ??
Submitted: 2 years ago.Category: Ford
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Answered in 9 minutes by:
10/13/2015
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago
Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Ford
Satisfied Customers: 16,051
Experience: 30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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Hi, my name is ***** ***** you have a voltmeter or test light?

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Customer reply replied 2 years ago
both
Customer reply replied 2 years ago
I checked relevant fuses and many others with my continuity tester
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

ok, in the fuse box under the dash, there is a accessory delay relay, do you know where this is?

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Customer reply replied 2 years ago
In addition to fuses, there are about 14 relays listed in the owners manual for the under hood fuse panel. None are labelled "accessory delay". There is a 60A cartridge fuse labeled "Delayed accessory, Power windows, Audio". It looks good and checks out good with the continuity tester.
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

this relay is in the fuse box under the dash, not in the engine compartment

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Customer reply replied 2 years ago
Got it, let me check
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

let me know when you locate it,Tim

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Customer reply replied 2 years ago
It's Relay #3
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

ok, remove the relay, and on th ebottom side of the relay, there will be numbers stamped on the relay, identifying each pin, they should be 30,85,86 and 87, then you need to check the socket where the relay plus in, you should have power on pins30 and 85, do you?

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Customer reply replied 2 years ago
Checking, might take a bit of time, kinda hard to get to the under dash fuse panel
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

let me know,Tim

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Customer reply replied 2 years ago
It's buried up under the dash where I can't get to it... Should I just replace the relay? I might be able to reach up and to that.
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

not yet, the relay supplies all the things that do not work, but we need to see if the pin 30n and 85 have power, before we replace anything,Tim

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Customer reply replied 2 years ago
Any clues on how to access it?
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

you may have to drop the fuse box to access it,Tim

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Customer reply replied 2 years ago
OK, I'll disconnect the battery and try that
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

we can check a few [power supplies for that relay, it may be easier than dropping the box?

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Customer reply replied 2 years ago
That might be better. It's not obvious how to drop the box
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

ok, in the fuse box under the hood, there is a circuit breaker 47, can you check this circuit breaker, and also in the fuse bix under the dash, fuse 17 also goes to this relay, can you check both the circuit breaker and the fuse, and see if you have power on both sides of each?

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Customer reply replied 2 years ago
OK
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

let me know,Tim

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Customer reply replied 2 years ago
Under dash #17 definitely has power both sides. Under hood #47 horn relay, hard to tell since it has 5 poles. Definitely power on one side from the battery to two of the poles. Tried sticking a small wire in the other side while plugging in the relay, no power, though not sure it was because of the way I tested it.
Customer reply replied 2 years ago
Horn works
Customer reply replied 2 years ago
OK, I'll check #62 Power Window CB. #47 in the owners manual is the horn relay.
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

yes, check that and see if power is on both sides?

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Customer reply replied 2 years ago
Confirmed. Power both sides of the CB
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

ok, now we need to go back and see if both the pins 30 and 85 have power at the relay, I know its tight, but we need to know,Tim

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Customer reply replied 2 years ago
OK, I'll go back to researching how to drop the fuse panel
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

Another thing we can try, at the dome light assembly, there are 4 wires, how many if any have power?

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Customer reply replied 2 years ago
OK, both 30 and 85 have power
Customer reply replied 2 years ago
Since it's out of the car, I'm bench testing the relay now
Customer reply replied 2 years ago
Bench test of the relay, ussing gthe method in the link below, shows connectivity and that it's working properly.
http://easyautodiagnostics.com/misc-index/relay-bench-tests-2
Arrgh...
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

OK, DID YOUHAVE A CHANCE TO CHECK THE 4 WIRES AT THE OVERHEAD CONSOLE AND SEE HOW MANY HAD POWER?

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Customer reply replied 2 years ago
Are you still there?
I need to put the relay back in to test the 4 wires, which may take some time.
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

yes , I will be on and off all day long,Tim

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Customer reply replied 2 years ago
OK, Thanks
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

you bet,Tim

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Customer reply replied 2 years ago
None of the 4 wires going to the dome light have power
Customer reply replied 2 years ago
Not sure if I mentioned, the car does run and drive, but I have no tach, speedometer, climate control, or audio. No gauges including fuel, temp or oil pressure. None of the idiot lights come on as the key is turned on to start.
Customer reply replied 2 years ago
Tim, Are you there?
Customer reply replied 2 years ago
While working on the Accessory Delay Relay under the dash, I also checked the Battery Saver Relay which was also good.
Customer reply replied 2 years ago
Are you there today?
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

ok, the power from those come from the battery saver relay, if the 17 fuse is good, then the batery saver relay is getting power on 2 wires, but not getting a ground from the instrument cluster, can you remove the relay and see if the 86 has a good ground,Tim

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Customer reply replied 2 years ago
OK, I'll check it
Customer reply replied 2 years ago
There is no 86 on the Battery Saver Relay, it's a smaller relay. Did you mean the Delayed Accessory Relay position 86?
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

the battery saver relay may be labled 1,2,3 and 4, is it?

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Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

Ok, pin 2 should have good ground, with the key on?

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Customer reply replied 2 years ago
Checking now
Customer reply replied 2 years ago
Pin 2 on the Battery Saver relay is grounded with key on, key off and even when the battery is disconnected.
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

ok, if you have power 1 and 3 of the battery saver rely, and a good ground on the 2 pin, but no power going out to the dome light assembly, then you have a bad relay, or a open wire inside the fuse box,Tim

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Customer reply replied 2 years ago
I do have power to 1 and 3, and ground to 2. I bench tested the relay, in fact, I swapped it with another relay and both bench tested good. Must be a fried wire.
When I accidentally shorted the dome light (which started this whole mess) I didn't smell electrical smoke, so I expected a blown fuse. As I've said, it's affecting a ton of other things. Would a fried wire to the dome light cause all the other components to fail?
Customer reply replied 2 years ago
If it's a fried wire, I would expect it to be part of fuse 17. Does that make sense?
Customer reply replied 2 years ago
Found the problem......
Customer reply replied 2 years ago
It was a seemingly unrelated 15A fuse for the courtesy lights that blew when the dome lights were shorted. Shocked that it affected so much stuff.
Ford Mechanic: Tim Mohr, ASE MASTER TECH replied 2 years ago

Glad you got it fixed,Tim

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