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Dash mounted horn button

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YOUR RESEARCHDash mounted horn button

Leading reported evidence

Run momentary switch

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Unsuccessful attempts: 1
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Suggestion
It sure looks like you could just run a momentary switch with one leg to ground and another into that BN/WH wire, or direct to terminal 85 on the horn relay.
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Dash mounted horn button

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Leading evidence: 'Run momentary switch' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run momentary switch' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Run momentary switch

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
It sure looks like you could just run a momentary switch with one leg to ground and another into that BN/WH wire, or direct to terminal 85 on the horn relay.
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Dash mounted horn button

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3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

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POST 1 / ORIGINAL POSTEROriginal post

After someone wasn't paying attention and rolled back into the front of my (hornless) track car - I regret not having a horn any more. Is there a way that I can jump the horn relay to a momentary switch on the dash as a good work around? Simiar thought process to the radiator fan over ride switches.

POST 2Original post

Assuming your horn wiring is still intact, add your momentary switch as noted above. Terminals 85 & 86 are the relay's coils and will activate the horn when energized. Be sure to add an inline fuse if you're not tapping into an already-fused circuit from the fuse box.

POST 3Original post

I don't know what year your 996 is, looks like a 996.1. Either way it looks the same - in the 2002 wiring diagram (pg. EWD-81 in the Bentley manual), the wires to and from the horn button are BN, and BN/WH. The BN/WH terminates at terminal 85, pin A2, of the 40A horn relay (relay panel 1, relay position 10). It looks like it is ground switched. It is the same for the 1999 wiring diagram (pg. EWD-43 for the switch and EWD-15 for where it enters the relay a terminal 85, pin 2). It sure looks like you could just run a momentary switch with one leg to ground and another into that BN/WH wire, or direct to terminal 85 on the horn relay.

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