Motorcycle Repair: 1983 honda shadow 750, honda shadow 750, fuel system components


Question
I bought this 83 shadow at auction.  I was a mechanic for over 7
years.   I rebuilt the carbs, bought a new fuel pump, and a new
fuel relay.  I tested the new fuel pump directly to 12 volts for a
second and it works.  The fuel relay/ cut off is a three prong
relay.  I hooked my multi meter to the relay's incoming power
connection, and I am getting 12 volt to two of the relay's
terminals.  The other is for the exit power to the fuel pump,
which doesn't have power as it shouldn't.  When I hooked the
new relay up to the terminal, it is not putting power through to
the fuel pump.  I thought it was a faulty relay so I complained to
the store where I bought it and they sent me a new one free and
said they have never had a new relay come in faulty.  And then
said if this one doesn't work then it must be something else.  I
hooked this one up and it didn't work either.   I thought that
since I had power to two terminals that that it should work and
that the third is an exit to the fuel pump.  I know the third is to
the fuel pump because I chased the wire to it.  What do you
think the problem is.  I am getting a fuel charge, 12 volts, to the
relay on both prongs that come in to it.  Should I have power on
both or just one.  The bike was laid down before I got it, and I
don't know if there is something else electronically that over
rides it.  Thank you for your time and answer.  

Scott

Answer
Hi Scott,

Learn about testing the fuel system components at the following web resources.

Respectfully,
Mark Shively



HONDA COMMON SERVICE MANUAL (393 PAGES)

http://www.nighthawk750.com/maint/Honda_Common_Service_Manual.pdf

http://www.diff.ru:8000/Honda_Common_Service_Manual.zip
http://www.blackbears.ru/manual/files/Honda_Common_Service_Manual.zip

ftp://thepit.shacknet.nu:1001/Misc/Honda_Common_Service_Manual.rar


VT700 C (1983-1984) / VT750 C (1983)

http://www.shadowclub-bavaria.net/manuals/vt7__/pdf/vt7__.pdf

http://www.diff.ru/manual/files/Honda_vt750Shadow_Shop.zip


VT750 (1997-1998)

http://www.shadowclub-bavaria.net/manuals/vt750/pdf/vt750_64MBA00.pdf

http://www.diff.ru:8000/Honda_Shadow_VT750C_'83_Parts_Catalog.zip