P2 Headlamp flasher

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RobHomewood
Posts: 199
Joined: Tue Oct 22, 2013 8:04 pm

P2 Headlamp flasher

Post by RobHomewood » Wed May 06, 2020 7:12 pm

I am attempting the replace the ancient wiring in my '39 14 DHC steering column etc and update the related circuits. The pass lamp will be switchable separately but only with dipped headlights on. I have a flasher of sorts already but want to incorporate a discreet relay which will disconnect the dipped beams & pass lamp if they are on when flashing main beams but leave the sidelamps on, obviously. Can anyone recommend a suitable relay unit for positive earth car? I am using LCD bulbs so the current shouldn't be too great but it would seem a good moment to protect the circuits anyway.
Rob

GOY189
Posts: 467
Joined: Sun Oct 19, 2008 5:08 pm

Re: P2 Headlamp flasher

Post by GOY189 » Fri May 08, 2020 4:31 pm


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Phil - Nottingham
Posts: 344
Joined: Thu Oct 09, 2008 10:45 am
Location: Nottingham

Re: P2 Headlamp flasher

Post by Phil - Nottingham » Sat May 09, 2020 12:14 pm

Old style mechanical relays are not polarity conscious - you need a Change over relay. Vehicle Wiring Products do a variety
P2/P4/P5/P5B/LR's - EXJ 8**/2**8MY & others

RobHomewood
Posts: 199
Joined: Tue Oct 22, 2013 8:04 pm

Re: P2 Headlamp flasher

Post by RobHomewood » Sun May 10, 2020 8:20 am

Many thanks for your suggetsions, I shall check them out. Does anyone have experinec of installing these relays?
Rob

HAD501
Posts: 17
Joined: Thu Apr 23, 2020 10:48 am

Re: P2 Headlamp flasher

Post by HAD501 » Sun May 10, 2020 10:41 am

Hi
I fitted relays to my 12 a while ago to reduce the loading on the light and dip switches. I didn't think to include a flasher which would have the more useful mod as the car doesn't get a lot of use in the dark!
Generally speaking relays aren't polarity sensitive but some do have an internal supressor diode across the coil and so need to be connected the correct way round - pin 86 to +ve on the ISO cube-type commonly used on cars.

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