Jeff:
I can't vouch for the terminal numbers (11 and 12) but I can
vouch for the rest of your analysis. Jumpering two leads at the
SMB is how my DPO bypassed the seat belt interlocks.
My DPO cut the two leads in the harness near the plug for
the SMB, and used a crimp connector to short them together on
the harness. The corresponding terminals on the SMB were left
unconnected. He left the SMB otherwise connected, so the
key buzzer and seat belt light still worked.
Probably the only change my DPO made that actually makes
sense =:-o
Vance
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Jeff Fetner
Sent: Sunday, April 11, 2004 8:09 AM
To: abehravesh; 6pack@autox.team.net
Subject: Re: 1974 TR6 doesn't crank
I know what you mean Ali - 74 was the first year of the "no seat belt
- no
start" US safety rule, and Triumph solved it with the seatbelt module
mounted on the inside passenger bulkhead. On mine, I think the DPO
bypassed
it and by looking at the Masters diagram I think I see how.
On a 74, the White/Red-trace wire from the started switch that
normally
engages the starter solenoid instead goes to the seatbelt module "brain"
(SMB). Instead of putting 12 volts to the starter solenoid, you are
only
asking it permission to start. The White/Orange-trace wire goes from
the
SMB to the starter relay (engine compartment by fusebox), where in
theory,
power closes the relay to send 12V to the starter. I believe if the
White/Red wire was jumpered into the White/Orange wire that goes to the
starter relay, the SMB would have no say in the starting sequence.
I just looked the circuit and I can't see where the DPO jumpered it (I
would thing that connecting Terminal 11 to Terminal 12 at the SMB plug
would
do it). Since I didn't actually bypass the system, maybe there is
someone
who has. Cheers.
Jeff
74 CF13816U
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