towbar wireing

[101splat]

hi ave got a v70 d5 2002 iv fitted towbar and i got the geunine wireing harness from dealer its std 7 pin but i cant get the fog light to work it said to conect blue wire to the pin and i done that then i read the bit in the instructions that say i need fog light realy kit ive got one today but no info of how to fit and where ?

[m30rmf]

You need a software update for the foglights to work correctly......thats what volvo told me when I bought a wiring kit only a few weeks ago.....

[101splat]

thanks for that garage dident tell me when a bought kit, looks like trip to garage to get that done sounds expensive to get done i may just live without foglights for now till it needs garage

[mrdave2003]

no software update needed for yours unless you want the foglight on the car to turn off when a trailer is connected.
You will need to put the relay in and all should then work. Just done this on mine. The instructions should show where the relay goes?

[101splat]

Originally Posted by mrdave2003

no software update needed for yours unless you want the foglight on the car to turn off when a trailer is connected.
You will need to put the relay in and all should then work. Just done this on mine. The instructions should show where the relay goes?

ave serched the manuel it shows everthing apart from relays ? i just got relay in bag with part no on outside no instuctions were with it can u rember which place it goes in fuse box ? thanks dave

[mrdave2003]

will dig out my instructions this eve, can't remember off the top my head

[kinga]

hi mate,

not sure about the genuine wiring harness you've got, but for a normal 'off-the-shelf' wiring kit, you really need a 7 way bypass relay.

The V70 2000-on uses a multiplex system and you are advised to run all the wires through the 7 way relay to avoid putting any overload on the existing wires in case any damage is caused (probably expensive!).

Not hard to wire in - they all come with instructions - just more wires.

The idea is that when you indicate, say, the indicator wire tells the relay to make the caravan indicators work, but then the power to work the caravan indicators comes straight from the car battery and not from the car's existing indicator wiring - same goes for the foglight.

These relays are available from ebay of caravan shops

hope this helps.

[101splat]

hi kinga
the loom i have is genunie volvo part std 7 pin socket just connects to plug in spare wheel cost me £17.00 from main dealer it just that i dident relise that i needed a new relay to work fog light £10.00 i have since found correct location in rear fuse box got that week or so ago and fitted today and its all working fine now