Hella Sharptone horns with relay

ZStalker505 · 07-10-2024, 07:56 PM

Finally got around to messing with these horns. Supposedly yhe stick horns are already on a relay so plugged in the signal wires to the right spade of you're looking at the back of the hella horn and black ground wire to the left spade. Annnnd they barley put out noise worse than stock. So guessing they need the relay wired to battery but can't seem to find a definitive on how to wire the relay..m it's either pin 85 is+ 86- or vise versa. Depends on if steering wheel horn switch is connected negatively or positively.

ZStalker505 · 08-11-2024, 06:13 PM

Never mind seems that the yellow horn wire is the sugnal not the green....
Anyone have experience rience wiring in horns with relay? I can't seem to get them to work. 30 pin is direct power from battery for now all I have is a 7.5amp fuse not blown, 87 is + on horns if both horn terminals are on top of horn this is the left pin from what I can tell. 86 green wire going to stock horn. 85 grounded tried the stock black wire and also running separate grounds for horns/ relay attached to right pin of the horn connectoins are on top of that makes sense.
20240811_113830.jpg

k67p67 · 08-13-2024, 03:02 PM

Seems unnecessarily complicated. The horn signal passes through a relay for each of the stock horns. Each Hella horn has two terminals. I don't think the polarity matters. Ground one terminal and connect the other terminal to the stock horn wire. Does this not work?

ZStalker505 · 08-13-2024, 03:30 PM

Quote:

Originally Posted by k67p67

Seems unnecessarily complicated. The horn signal passes through a relay for each of the stock horns. Each Hella horn has two terminals. I don't think the polarity matters. Ground one terminal and connect the other terminal to the stock horn wire. Does this not work?

Thats what I thought but whatever, possible the green wire for that horn is cut or something since they were relocated at one point should have been a much shorter less frustrating job.

k67p67 · 08-13-2024, 05:52 PM

Disconnect the green wire from the aftermarket relay. When you put a DMM on the green wire and press the horn, do you see 12V+?

ZStalker505 · 08-13-2024, 06:24 PM

Quote:

Originally Posted by k67p67

Disconnect the green wire from the aftermarket relay. When you put a DMM on the green wire and press the horn, do you see 12V+?

Its already done, green wire just didnt work. After testing the yellow wire to the other horn I just ran an extension to the relay problem solved they work now.

08-11-2024, 06:13 PM	#2 (permalink)
ZStalker505 Base Member Join Date: Jan 2023 Location: NM Posts: 201 Drives: 14 SC Nismo Rep Power: 4	Never mind seems that the yellow horn wire is the sugnal not the green.... Anyone have experience rience wiring in horns with relay? I can't seem to get them to work. 30 pin is direct power from battery for now all I have is a 7.5amp fuse not blown, 87 is + on horns if both horn terminals are on top of horn this is the left pin from what I can tell. 86 green wire going to stock horn. 85 grounded tried the stock black wire and also running separate grounds for horns/ relay attached to right pin of the horn connectoins are on top of that makes sense. 20240811_113830.jpg Last edited by ZStalker505; 08-11-2024 at 07:21 PM.

08-13-2024, 03:02 PM	#3 (permalink)
k67p67 Enthusiast Member Join Date: Oct 2016 Location: Rancho Cucamonga, CA Posts: 315 Drives: 2017 Nismo Tech 6MT Rep Power: 3938	Seems unnecessarily complicated. The horn signal passes through a relay for each of the stock horns. Each Hella horn has two terminals. I don't think the polarity matters. Ground one terminal and connect the other terminal to the stock horn wire. Does this not work? __________________ SOLD2017 370Z Nismo Tech 6MT PART OUT IN PROGRESS Work \| Motordyne \| Powertrix \| Swift \| Michelin \| Takeda \| Hotchkis \| RJM \| Voodoo13 \| SPL \| SPC \| Z1 Motorsports \| ZSpeed \| Morimoto \| Craft Square Last edited by k67p67; 08-13-2024 at 03:16 PM.

08-13-2024, 05:52 PM	#5 (permalink)
k67p67 Enthusiast Member Join Date: Oct 2016 Location: Rancho Cucamonga, CA Posts: 315 Drives: 2017 Nismo Tech 6MT Rep Power: 3938	Disconnect the green wire from the aftermarket relay. When you put a DMM on the green wire and press the horn, do you see 12V+? __________________ SOLD2017 370Z Nismo Tech 6MT PART OUT IN PROGRESS Work \| Motordyne \| Powertrix \| Swift \| Michelin \| Takeda \| Hotchkis \| RJM \| Voodoo13 \| SPL \| SPC \| Z1 Motorsports \| ZSpeed \| Morimoto \| Craft Square

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07-10-2024, 07:56 PM	#1 (permalink)
ZStalker505 Base Member Join Date: Jan 2023 Location: NM Posts: 201 Drives: 14 SC Nismo Rep Power: 4	Finally got around to messing with these horns. Supposedly yhe stick horns are already on a relay so plugged in the signal wires to the right spade of you're looking at the back of the hella horn and black ground wire to the left spade. Annnnd they barley put out noise worse than stock. So guessing they need the relay wired to battery but can't seem to find a definitive on how to wire the relay..m it's either pin 85 is+ 86- or vise versa. Depends on if steering wheel horn switch is connected negatively or positively.