86 Ranger AC wiring colors and connections

[BGS]

The previous owner converted this (2.9) truck to AC. He used a toggle switch to control the AC instead of installing the correct dash control head. He seems to have also added a wire (yellow) to the Relay. I've looked up many schenatics on the net and can't seem to find one where the colors match what I have. All seem consistent with the dash control having Green/Purple and Brown orange.
The relay has: Blue/red which is connected to the Vacume control. Two yellows jumped between two poles and another yellow lead that was used with a toggle swictch the previous owner installed instead of the "Dash control".
The vacume control has two leads. The blck goes to the compressor and the Black/red comes from the solenoid.
Does anyone have a schematic showing these colors? Or can someone assist in sorting out how things are powered/connected after the dash switch.

 

[RonD]

Yellow wire is usually the Power wire from the 10A fuse in the fuse panel.

Since it was an add-on he may have pulled the harness from another Ford model which is why the colors don't match.

If you have an '86 Ranger A/C wiring diagram then I would re-label it to match your colors, this may help you make sense of current wiring

 

[alwaysFlOoReD]

I don't know if this will help but here is a free resource for wiring diagrams for ANY vehicle;
http://www.bbbind.com/free_tsb.html

Richard

 

[BGS]

Yellow wire is usually the Power wire from the 10A fuse in the fuse panel.

Since it was an add-on he may have pulled the harness from another Ford model which is why the colors don't match.

If you have an '86 Ranger A/C wiring diagram then I would re-label it to match your colors, this may help you make sense of current wiring

Thanx Ron: I hadn't thought that a different harness might have been used. My fuse panel and manual only shows a 30 amp fuse for the blower & AC. Where is the 10 amp wire to the relay supposed to be connected? He had it trapped in the 30 ampfuse position with an inline fuse and I have disconnected all of it in anticipation of wiring it correctly.

 

[BGS]

It looks like they used the "factory installed" heater box set up etc. and then used their version of the dealer installed set up. The lt grn/purple wire is actually there on the pass side fender well. Mounted on the heater box is a relay they installed to operate the clutch magnet on the compressor with the red terminal spliced into the Blue/red of the fan control resistor terminals (?). So I am surmisising that when the dash control for the factory is installed the A/c mode will energize the lt grn/purple which goes directly (according to the diagram) to the A/C pressure switch, and then out to a blck/yel going to the EEC, A/C clutch Coil and Vacume valve solenoid. It is the distribution (Harness?) of these yel/blcks that I now need information on. I can't seem to find the harness connections for them.
Does anyone have pics of the A/C pressure switch & Vacume valve solenoid? It would help.

 

[freedom5]

2.9 AC Wiring

Looks like you're on the right track. I have a Haynes manual that shows a red wire to the relay coil with LtGrn/ppl from the AC control to the clutch cycling pressure switch. Tan/yellow from the pressure switch to the cut out relay with a Blk/yellow to the AC clutch.

 

[BGS]

Looks like you're on the right track. I have a Haynes manual that shows a red wire to the relay coil with LtGrn/ppl from the AC control to the clutch cycling pressure switch. Tan/yellow from the pressure switch to the cut out relay with a Blk/yellow to the AC clutch.

Thanx: Unfortunately your pic is too small to read. From your description it does sound like a "dealer Installed" set-up.

I received what was supposed to be a "factory" control head from the states, however instead of a Two conductor AC switch it came with one with 3 leads (???!!!) my gawd I wish folks would do stuff properly the first time. I am going to try to get the correct AC switch and connect pin 86 on the relay to the green/purple that is on the fender well. # 87 to the compressor clutch, 86 to ground and 30 to an "ignition on" source. Hopefully I can get the switch and this works.
Does this sound reasonable?