No high beams -- 98 V70 Manual

Post by **wizechatmgr** » 06 Jan 2021, 21:03

I have low beams and parking lights. When I go to engage the high beams it doesn't flash and I get nothing on the dash.

I'm thinking relay, fuse or switch/stalk. I'll be checking the requisite fuses tomorrow. I know it blew an alternator, so it's possible the high got hit if it were engaged at the time.

Anyone know the failure likelihood on each of these with exception of the fuse? Do we have any chopped up schematics?

And for those wondering, it's darn near impossible to solder abs harness wires. I don't know what is up with them but I think the next time I'll try acid core solder.

Post by **manovlov** » 07 Jan 2021, 00:07

Hope it will help.

Manov

Volvo 850 Electricals diagrams .pdf: (2.57 MiB) Downloaded 108 times

Post by **abscate** » 07 Jan 2021, 04:37

I would check bulbs first. I’ve got spares to swap in the driveway.

Post by **manovlov** » 07 Jan 2021, 08:01

I had thought this step had been done first. Hence the electrical diagrams .

But yes, you have to check the bulbs first.

It's still Abscate who wins a box of chocolate!

Abscate, how dare you ?

Post by **BEJinFbk** » 07 Jan 2021, 14:59

Any voltage at the high-beam sockets?

Most susceptible to high voltage?
I’d look at the hi/low headlight relay.

And here’s a fuse legend:

Post by **wizechatmgr** » 07 Jan 2021, 15:57

Thanks all, will be giving it a crack either tonight or tomorrow morning.

Post by **abscate** » 07 Jan 2021, 19:32

We will add any bright ideas here.

Post by **manovlov** » 08 Jan 2021, 04:29

abscate wrote: ↑07 Jan 2021, 19:32 We will add any bright ideas here.

Post by **abscate** » 08 Jan 2021, 06:44

Interesting

The stalk bypasses the light relay. So if the bulbs test good, you can rule out simple relay failure with the stalk test.

Fuses 11C/19-22 and 11C/13 are relevant too

Post by **wizechatmgr** » 08 Jan 2021, 17:15

abscate wrote: ↑08 Jan 2021, 06:44 Interesting

The stalk bypasses the light relay. So if the bulbs test good, you can rule out simple relay failure with the stalk test.

Fuses 11C/19-22 and 11C/13 are relevant too

I'll try to test that tonight if I get any time.

For those wondering, don't wash an NA with a distributor cap if you aren't sure it'll stay dry... Don't ask how I know =(