I need a relay or something

[zogthegreat]

Hi everyone!

I have a bike rack on my 2011 Ford Taurus that I want to install a light that activates when I step on the brakes. Due to the way Ford setup the lights on the Taurus, I can't just tap into the brake lights in the rear. I did manage to tap into the brake light that is in the back window, but due to voltage drop, I'm only getting 6v at the end of the wire. Since I already have a 12v hot wire running to my trailer wiring, what I would like to do is have the wire that comes from the rear window brake light run to some kind of relay or switch to the 12v hot and then from the 12v hot to the bike rack.

Does anyone have any suggestions?

Thanks!

zog

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[BSchrowang]

Sounds like you need a relay.

 

[adulbrich 5,000+ posts]

x3 for relay.

However, you should run new wire off the point where your fuse for the brake lights is. 6v is bad drop.

 

[zogthegreat]

Do you have any suggestions about what type of relay I need?

 

[adulbrich 5,000+ posts]

A 40 amp "bosch style" off ebay for $5

 

[zogthegreat]

A 40 amp "bosch style" off ebay for $5

Something like this?

https://addison-electronique.com/relais-style-bosch-a-l-epreuve-de-l-eau-bobine-12vdc-40a-12vdc-30a-12vdc.html

I also found these:

http://www.ebay.com/itm/12-Volt-30-40-Amp-Bosch-Style-Relay-For-Car-Alarm-Starter-Kill-Amp-Turn-on-/141783107660?hash=item2102ee884c:gLQAAOSwWnFWAw5o

http://www.ebay.com/itm/1-Pack-The-Install-Bay-RL3040-12-Volt-30-40-Amp-Relay-Bosch-Style-12V-DC-/141401630091?hash=item20ec31a58b:g:AbgAAOSwDk5UD4Yo

http://www.ebay.com/itm/Herko-Bosch-Style-4-PIN-Blade-Post-Relays-SPST-80-Ohm-NO-40A-14VDC-NC-30A-14VDC-/360919592949?hash=item54087beff5:g:m64AAOSw6n5XsieI&vxp=mtr

 

[adulbrich 5,000+ posts]

Something like this?
https://addison-electronique.com/relais-style-bosch-a-l-epreuve-de-l-eau-bobine-12vdc-40a-12vdc-30a-12vdc.html

I also found these:

12 Volt 30 40 Amp Bosch Style Relay for Car Alarm Starter Kill Amp Turn On | eBay

1 Pack The Install Bay RL3040 12 Volt 30 40 Amp Relay Bosch Style 12V DC | eBay

Herko Bosch Style 4 Pin Blade Post Relays SPST 80 Ohm No 40A 14VDC NC 30A 14VDC | eBay

Yep, that's it