[oletrucks] Electrical Questions - horn and gas gauge

["Parkinson, Rob" <Rob_Parkinson@jdedwards.com>]

Hi - My son purchased a 51 3100 Chevy.
It was already converted to 12V.
There is no horn relay, so I need to buy a generic one - anyone have any idea 
where, part number, etc?
Also, the gas gauge doesn't work - the lights in the gauge do work though - 
does that mean there is power there for the gas gauge - will I need a power 
reducer between the sender and the gauge?
Thanks for any help.
Rob   
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959