Relay Box - What the heck is this?

[GrayCar]

In the engine bay, in the relay box there, there is a 3/4 wire plug in the corner of the box (see illustration).

What the heck is that for? I've gone through the shop manual and can't find any explanation for it.

Mine looks a little fried.

[accordztech]

i THINK that goes to the LOAD detector circut....i forgot whats it called exactly...but as long as ur car still runs with the lights on and the AC on that piece is fine.

[GrayCar]

Hmm, well that's the thing, my AC doesn't run right now. In the process of troubleshooting. Figured I try the electrical route first before I get sucked into a R134a swap.

[accordztech]

well if ur AC doesnt turn on, well the fan doesnt kick in when u turn it on then ur compressor isnt turning on. usually that is caused by a low level of freon r12 in the system.

it can be a burnt relay or something as well.

but i was talking about earlier that if ur car shut down when u put a load on the engine, like lights on or some high powerd thing like highbeams and or ac and ur car turns off, the load circit needs to be checked...if not then that area is not your problem.

you may just have low freon in your system..u can convert if u want but its nice to check for leaks too.

[GrayCar]

Really? One thing my car does is whenever something electrical kicks in, like the headlights, bass amp, radiator fan...

The idle stumbles a bit. Just a little dip in RPM and slightly rough.

Doesn't matter the amount of the load, if it's just a window and everything else is off it will do it.

Always recovers quickly and only does it then.

I chalked it up to an old alternator.

[92accordDx]

my idle drops too when like my fans go on or might lights are on i dont know what is. might be a bad ground or something.