the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

477 H7 LED fog lamp polarity


Post ReplyPost New Topic
< Prev Topic Next Topic >
skippi 
Member - Posts: 3
Member spacespace
Joined: February 23, 2017
Location: France
Posted: December 23, 2017 at 1:26 PM / IP Logged Link to Post Post Reply Quote skippi
Hello477 H7 LED fog lamp polarity -- posted image.
I am making a lamp for my cabin using a brand new, high power LED vehicle fog lamp bulb(very long story) and a crystal bowl as the lampshade.
Although the bulb was very expensive from a uk high st.retailer Halfords, it has no markings with polarity, and both spade connectors are identical.
Plus there is nothing noting it's wattage or amperage. (I cannot take it back just yet I live in France 600 miles from the shop. I need light to work by)
I have a switch, and a cig lighter socket and plug but need to know how big a fuse to add. I have a standard multimeter. I am not clued up about electronics at all but I do understand the absolute basics.
Also, most frustratingly, I have read that LED vehicle bulbs have to match polarity so how do I tell which way to wire it? If I guess incorrectly the first time, will it damadge the bulb?
I am using my own spade connections, not vehicle lamp fittings.
All The Good Things
skippi 
Member - Posts: 3
Member spacespace
Joined: February 23, 2017
Location: France
Posted: December 23, 2017 at 1:47 PM / IP Logged Link to Post Post Reply Quote skippi
477 H7 LED fog lamp polarity -- posted image.
i am an idiot 
Platinum - Posts: 13,666
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: December 23, 2017 at 6:32 PM / IP Logged Link to Post Post Reply Quote i am an idiot
Is it a high and low beam type lamp? If so, the frame part is ground and the 2 terminals are positive, 1 for high and the other for low beam.
If it is a single element lamp, one of the terminals is positive and the other is ground. Connect power via a 2 amp fuse to 1 and ground to the other. If it does not illuminate reverse the wires.
skippi 
Member - Posts: 3
Member spacespace
Joined: February 23, 2017
Location: France
Posted: December 24, 2017 at 1:26 PM / IP Logged Link to Post Post Reply Quote skippi
@i am an idiot
Thanks so much for such a speedy concise reply.
I will follow the instruction asap and let you know.
Am pretty sure it is not high/low beam as it would be labelled on the box as an extra selling point.
All The Good Things

If you wish to post a reply to this topic, you must first login.
If you are not already registered, you must first register.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Friday, March 29, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer