Question... I'm working on my 1989 and looking at the harness for the cassette radio (Connector B33) I notice pin 3 is a yellow/blue wire. I don't see this wire in any of the listings elsewhere for radio harnesses. Anyone have an idea what it's for?


I'm assuming there's no separate stereo amp hidden elsewhere, where this could be the remote turnon for it? Below are based on the Jag wiring diagrams...


Pete


Right now I have:
Round Connector:
Brown/White-12v Constant
Green/Orange-12v Switched
Black-Ground


Square Yellow Connector (B33):
Pin 2- Antenna Trigger (Green/Black)
Pin 3-Illumination? (Yellow/Blue)


Pin 4 - RR Door Positive (Pink/Yellow)
Pin 5 - RF & RR Door Negative (Pink/Green)
Pin 6 - RF Door Positive (Pink/White)

Pin 7 - Rear Right Under Seat Positive (Pink/Orange)
Pin 8 - Rear Right Under Seat Negative (Pink/Red)

Pin 9 - LR Door Positive (Red/Brown)
Pin 10- LF & LR Door Negative (Red/Green)
Pin 11- LF Door Positive (Red/White)

Pin 12- Rear Left Under Seat Positive (Red/Purple)
Pin 13- Rear Left Under Seat Negative (Red/LtGreen)

 

Hi Pete,

According to the '88 Electrical Guide, which appears to match your '89 based on a spot-check of the pinouts you list, that Yellow/Blue wire is indeed for one of the radio lighting circuits. The power comes from the Radio Lighting Relay, which is behind the trim panel at the passenger footwell A pillar. The Red/Pink wire on pin 15 of that connector ties in to all the dash/fascia lighting power, so the Yellow/Blue wire must be for some other lighting function on the radio, perhaps the brighter light when you turn it on? Pin 2 of that same connector connects to the CPU/Central Microprocessor, which in turn controls the Antenna/Aerial mast.

All six speakers are powered by the head unit; there is no separate power amp. You don't list Pins 1 and 2 of connector LB32. The schematic shows that Battery Power arrives at the head unit via a Brown/White wire at pin 1, and pin 2 connects to a choke and then via a Light Green/Orange wire to the A/C and Radio Relay behind the passenger side knee bolster/underscuttle.

Hope this info helps!

Cheers,

Don

 

Interesting, ok - I recall the lighting on the radio wasn't tied to the dimmer module...and would just always come on. I don't believe I checked to see whether the lighting on the radio turned off when the radio turned off...but I'll have to poke around. Perhaps it was there for the dimming capability for future radios.






Pete