Why are the electrical control units needed?

**ADRIANFARINA** · 03-02-2012, 08:52 AM

I've installed power windows and mirrors , and about to install power antenna and central locking to my 86 DX hatch.
I have everyting original , but don't have the control units.. why do I need them for? I've installed them with electric relays and connected to after ignition positive and everything wirks fine.
thanks

***2oodoor*** · 03-02-2012, 01:32 PM

probably to prevent armature shorts when relays and switches get hung, visa versa, and to have a diode circuit in place to prevent reversing of polarity or back feeding voltage to something inappropriatley.

I know it is annoying. Sometimes control units have the relays soldered inside them as well and those will eventually become poor connections after time anyways...

**ADRIANFARINA** · 03-07-2012, 12:18 PM

so there is no problem not using them , just using relays ?

**91lowrider** · 03-15-2012, 03:33 PM

Where is the control unit located on a 85 lx? My driver window has a short somewhere along the "up" wire, and believe its in the control unit. Just need to locate so i can find the short or go grab another from the jy.