M Roadster LED underhood lighting
Last Modified May 9, 2011
Home > Daniel > M Roadster > M Roadster LED projects > M Roadster LED underhood lighting

I've wanted some underhood lighting ever since I had the underside of my hood painted. The picture below is with four 1W Luxeons mounted to the underside of the hood. It's quite a bit of light.

I've yet to measure the current draw, but each Luxeon is about 1 watt. Assuming 80% efficiency in the driver module, I'm somewhere around 5 watts. It should never be a problem to leave these on for many hours on end, assuming a typical 70 amp-hour battery.

All Pictures


Proposed Wiring

Due to the LED in the toggle switches being wired to ground and pin 3 on the toggle switch, I have to have +12V to the switches (the switches can't be used to switch ground unless I forget about using the LEDs). So I need a +12V source and ground to each of the switches. That's 2 wires into the DME compartment. I'd have 6 wires going out: hot and ground for each of the LED circuits. Put those in a 6-pole connector?

If I were going to order today, I'd order these from Mouser, which includes spares/supplies:

Part Quantity Description
794895-12 AMP Mini-Universal Sealed Connectors PLUG 6P
174670-16 AMP Universal MATE-N-LOK Connectors KEYING PLUG
794940-12 AMP Mini-Universal Sealed Connectors CAP 6P
770987-148 AMP Universal MATE-N-LOK Connectors PIN 22-18 AWG
770988-148 AMP Universal MATE-N-LOK Connectors SOCKET 22-18 BULK MINI UMNL
794758-196 AMP Universal MATE-N-LOK Connectors CAVITY WIRE SEAL
794995-196 AMP Universal MATE-N-LOK Connectors CAVITY PLUG SEAL
794772-66 AMP Mini-Universal Sealed Connectors INTERFACE SEAL 6P
189727-11 AMP Tools EXTRACTION TOOL
794894-16 AMP Mini-Universal Sealed Connectors PLUG 2P
794896-16 AMP Mini-Universal Sealed Connectors CAP 2P
794805-16 AMP Mini-Universal Sealed Connectors PLUG 4P
794939-16 AMP Mini-Universal Sealed Connectors CAP 4P
794772-26 AMP Mini-Universal Sealed Connectors INTERFACE SEAL 2P
794772-26 AMP Mini-Universal Sealed Connectors INTERFACE SEAL 4P

For a grand total of about $96.00


Parts

Parts for this project were sourced from several places. The quantities of some items below are well in excess of what's required, but are consumables I use regularly. Heatshrink and braided sleeve, for example. However, some things aren't listed because I have some... bases for zip-ties, Tefzel zip ties, solder, etc. I also haven't listed shipping costs. When I'm done I'll try to tally up a total.

Parts by Vendor

www.superbrightleds.com

www.cableorganizer.com

www.mcmaster.com

www.mouser.com

Totals by Vendor


Log


Ordered


Need to order


Documents


Daniel (dwm)