Does anyone know where I can download a wiring diagram for my Disco 1?
I've searched for one but haven't had much luck.

 

http://www.landroverresource.com/rave.zip

Download the RAVE there. It contains multiple manuals inside. One of them is the ETM (Electronic Troubleshooting Manual).

 

Read the ETM entirely. It explains their version of a wiring diagram. It is different from any schematics I have ever used in over thirty years of electrical systems experience.

 

In particular read the initial part of the manual that describes the color code. What are you working on - perhaps we can point you in the right direction.? Also an on-line source in link below.

 

I have something draining my battery and the previous owner did some "creative wiring" to replace a bad a/c switch.

 

MJy advice is remove all mods made by PO and start from that point on restoring correct functionality.

These wire harnesses are poor example of workmanship to say the least. Mods give you a real unknown factor.

 

That's what I plan on doing, just needed a wiring diagram for reference. Also my radio doesn't turn off when I shut off the vehicle, I have to turn it off manually. There doesn't seem to be any wiring mods made to the radio. Any insight? Thanks.

 

Radio gets power for the control head all the time through one fuse (keep memory and anti-theft code alive) - F6 in the satellite fuse box. F3 in the larger under dash fuse panel is the switch leg of power to the control head. Perhaps up stream the ignition switch or a relay. Or previous owner wiring you are yet to "discover"...

Got your security code for radio written down somewhere?