Wire Color codes -Green Books - 89-780

I have the Green Book, 780 1989 Wiring Diagrams.

What a wonderful book. Thanks Guys!

Most of the codes are clear. But some are not, to me.
There are some I do not know.

What is SB, W-SB, T-SB, GN, GR,?

I asume that BL is black, Y is yellow, GN-R maybe green w/red strip.

Anyway, my battery goes dead after being parked for a few days.
I assume that I have a high resistance short to ground.

Time for me to learn every wire. They are all in very good condition.
As is the whole car.
I think I will put in a new sound system, this winter.

Regards to you all!

AJ

 

Hi "AJ",

Re the Volvo wiring colour codes:

BL = Blue R = Red
BN = Brown SB = Black
GN = Green VO = Violet
GR = Grey W = White
OR = Orange Y = Yellow
P = Pink

True for the 240 series up to 1986, but I'm pretty sure it will work for
your '89 780.

Good Luck.
Andy I.

 

Well a short to ground can only be one thing - incredibly low resistance.
Everything else is a resistive load... You could have a low resistance
resistive load between positive and negative (chassis ground). This is the
most likely cause of the battery drain, something drawing too much current.

..... Sorry, but I just had to correct you, being an electrician and all.
People use the term "short circuit" for everything, a real short circuit
would leave you without power in fractions of a second, and massive sparks
would be seen.

 

another thought - check the door switches and courtesy lights. I had a bad
door switch that caused my courtesy lights to stay on after the doors were
closed - result, dead battery in a matter of hours. If in doubt, pull the
fuse.

cheers!
steve

93 volvo 850GLT 202000 miles

 

Thanks everyone!

I removed the radio/equallize.
That may have been where my problem was.
We will see. I do not drive it much in the winter.
Just play with it. This year I will put in a new sound system.
One of the POs had a changer put in at best buy and they really messed
up the wiring.

AJ @ Home in Wisconsin
1989 - 765 w/134k Miles
1989 - 780T w/143k Miles
1987 - 245 w/225k Sold

 

Glove compartment light!