Ignition Switch Ground

Hvymtl

Petty Officer 2nd Class
Joined
Jun 6, 2011
Messages
147
(1997 90 hp spl non vro with factory controls)

Does anyone know which ignition switch wire provides the ground for the overheat buzzer. I can't make heads or tails of the shop manual drawing but assume there is hot all the time to the horn and ground is applied to activate the horn. I get no buzzer when I turn the key on (or ever) , but horn works when 12 volts from battery applied directly to leads. No buzzer when grounding temp senders either.

All other gauges work fine.

Wires to horn buzzer are purple and tan/blue (or could be white/blue if faded).
 

Hvymtl

Petty Officer 2nd Class
Joined
Jun 6, 2011
Messages
147
Re: Ignition Switch Ground

Update: put a meter on leads to buzzer. I see 4.4 volts when key is turned. Not enough to activate horn.
 
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