Brake lights

for those with Series MM sidevalve cars produced between September 1948 and February 1953
Forum rules
By using this site, you agree to our rules. Please see: Terms of Use
Post Reply
Johnno
Minor Fan
Posts: 231
Joined: Wed Apr 28, 2004 8:33 am
Location: rainham,essex
MMOC Member: No

Brake lights

Post by Johnno »

Hi guys,sorry to ask again but I am having problems with brake lights on my '52. Overhauled brakes and hydraulics and new brake switch. The brake lights are on as the ignition is switched on. Any ideas please? Thanks, John.
Power to your Pistons,Johnnydoome.
mike.perry
Series MM Registrar
Posts: 10183
Joined: Sun Jul 24, 2005 11:39 pm
Location: Reading
MMOC Member: No

Re: Brake lights

Post by mike.perry »

I suspect that you have a faulty new switch. Do the brake lights go out when you disconnect one of the wires?
Plug hole with old switch whilst testing
Remove switch and connect wires to terminals, brake lights should not operate.
Connect wires together, brake lights should operate
Check connections for any bare wires
[sig]3580[/sig]
TvdWerf
Minor Addict
Posts: 550
Joined: Wed Jul 28, 2010 9:39 am
Location: Netherlands, Drenthe
MMOC Member: No

Re: Brake lights

Post by TvdWerf »

Measure the switch resistance, when he is a few Ohm's, something is wrong.
After taking out the switch, measure again.
It is possible there is still a little pressure in the pipe, what the switch can activate...
In that case, check if the brake pedal is coming back complete.
MM '51 LHD sidevalve
Johnno
Minor Fan
Posts: 231
Joined: Wed Apr 28, 2004 8:33 am
Location: rainham,essex
MMOC Member: No

Re: Brake lights

Post by Johnno »

Thanks guys,useful information.I will check all points and post back.
Thanks again,John.
Power to your Pistons,Johnnydoome.
Johnno
Minor Fan
Posts: 231
Joined: Wed Apr 28, 2004 8:33 am
Location: rainham,essex
MMOC Member: No

Re: Brake lights

Post by Johnno »

Well guys it turned out to be the floor pan preventing brake pedal returning properly! Adjusted master cylinder push rod and all in fine.Cheers mates.
Power to your Pistons,Johnnydoome.
Post Reply