"Simon H" <firstname.lastname@example.org> wrote in message
> "C. E. White" <email@example.com> wrote in message
>> "Simon H" <firstname.lastname@example.org> wrote in message
>>> 1998 4.0 SOHC Explorer - Does anyone have a schematic for the
>>> auxilliary power ditribution box (the one beneath the air filter box)?
>>> Or at least what component each relay supplies, working from the
>>> radiator end of the box? I was hoping to find some info on the box cover
>>> like you might expect to find on a fuse box cover. But there's nothing
>>> I'm trying to track down the fuses and relays connected with the
>>> compressor and controls for the self-levelling suspension. All the fuses
>>> in the dash panel and the main distribution box seem OK - I've pulled
>>> each one in turn and tested with a meter - so I'm guessing a bad relay
>>> might be the reason the air compressor never runs. It does run if I
>>> connect a 12V supply directly to it, so I guess the compressor is good.
>> Did you look in the owners guide? It is on page 142. See
>> http://www.motorcraftservice.com/pub...28/98expog.pdf .
> Oddly enough it did occur to me to look in the owners 'guide'.
> Unfortunately Ford don't seem to be too keen on divulging technical
> information to Explorer owners in the UK. We only get a basic 'put oil in
> here', 'put water in there' type of owners handbook.
> Haynes is not much use either.
> I don't seem to be authorised to look at the www.motorcraftservice page
> you suggested.
> Perhaps somebody with authorisation could just tell me which relay in the
> Auxilliary Supply box is for the compressor? Something like '2nd from the
> back' or 'the one nearest the radiator' will suffice.
> Simon H
Send me your real address to email@example.com
and I will send the
manual to you. You could also try
or go in
through the motorcraft front page -
and then click on
the "Owner Information" link on the left side of the page.
Item 15 is a 50A Maxi Fuse for the Air Suspension Solid State Compressor
Relay. It is the 5th fuse from the left on the front row. I am calling the
row of relays the back row. The 2 x 6 group of smaller fuses is in the
front right corner (these are fuses 1 through 12 - the larger fuses in this
line are number from 13 to 19 as you move right to left.
There are other fuses related to the air suspension. Fuse 4 is for the Air
Suspension Service switch (4 is the second switch from the right on the
second row of little fuses from the front). Here is a crude layout -
Relay Relay Relay Relay Relay Relay
29 28 27 26 25 24 23 22 21 20
19 18 17 16 15 14 13 12 10 8 6 4 2
7 5 3 1
Fuse/Relay Location Fuse Amp Rating Description
1 20A* Trailer Tow Running Lamp Relay, Trailer Tow Backup Lamp Relay
2 10A* Air Bag Diagnostic Monitor
3 30A* All Unlock Relay, All Lock Relay, Driver's Unlock Relay
4 15A* Air Suspension Service Switch
5 20A* Horn Relay
6 30A* Radio, Premium Sound Amplifier, CD Changer, Rear Integrated Control
Panel, Sub-Woofer Power (Fuse 3 & Fuse 5)
7 15A* Main Light Switch, Park Lamp Relay
8 30A* Main Light Switch, Headlamp Relay, Multi-Function Switch
9 15A* Daytime Running Lamps (DRL) Module, Fog Lamp Relay
10 25A* I/P Auxiliary Power Socket
11 25A* Console Auxiliary Power Socket
12 10A* Rear Wiper Up Motor Relay, Rear Wiper Down Motor Relay
13 30A** Auxiliary A/C Relay
14 60A** 4 Wheel Anti-Lock Brake System (4WABS) Module
15 50A** Air Suspension Solid State Compressor Relay
16 40A** Trailer Tow Battery Charge Relay, Engine Fuse Module (Fuse 2)
17 30A** Shift on the Fly Relay, Transfer Case Shift relay
18 30A** Power Seat Control Switch
19 20A** Fuel Pump Relay
20 50A** Ignition Switch (B4 & B5)
21 50A** Ignition Switch (B1 & B3)
22 50A** Junction Box Fuse/Relay Panel Battery Feed
23 40A** I/P Blower Relay
24 30A** PCM Power Relay, Engine Fuse Module (Fuse 1)
25 30A CB Junction Box Fuse/Relay Panel, ACC Delay Relay
26 - Not Used
27 40A** Junction Box Fuse/Relay Panel, Heated Grid Relay
28 30A** Trailer Electronic Brake Controller
29 30A** Flip Window Relay, Hybrid Cooling Fan Relay