voltmeter wiring

[nigelgibson]

i want to fit a voltmeter [digital ] whilst fitting a temperature gauge as in jaylee's thread.
i would like it to switch between LB and SB so i can gauge status of both.
i was thinking of a unit that already has a switch to turn backlight on/off thereby saving power. can it be done and if so what sort of switch do i need to add to switch between batteries?
the backlight switched version has 4 wires but the version with no backlight switch has only 2. which is favourite ?


see this link;
http://www.ebay.co.uk/itm/200VDC-BLUE-D ... 1c1dc99a2e ;

[Triple/R]

i want to fit a voltmeter [digital ] whilst fitting a temperature gauge as in jaylee's thread.
i would like it to switch between LB and SB so i can gauge status of both.
i was thinking of a unit that already has a switch to turn backlight on/off thereby saving power. can it be done and if so what sort of switch do i need to add to switch between batteries?
the backlight switched version has 4 wires but the version with no backlight switch has only 2. which is favourite ?

p.s if missfixit is reading this how do i add link to show ebay page for above item ? my efforts wont display pic !

Eyup Nigel to get link off ebay~~go to top of ebay page~left click on link,it will be all blue writing~right click & click on copy~~go back on forum (to topic) write whatever your writing about~~drop cursor down a couple of spaces~right click,then left click on paste~~before pressing submit you can press preview to see if everything is ok,if it is press submit.

[nigelgibson]

Eyup ......it works , thanks for link assist. !!

[teenmal]

Hi,I used an ON/OFF/ON 3 pin rocker switch.

Cheers.

[nigelgibson]

does the 3 pin on/off/on switch between lb and sb and will it matter if gauge has backlight on/off switch ?


will this do it?


http://www.ebay.co.uk/itm/Car-Van-Boat- ... 27bc09f39b

[teenmal]

does the 3 pin on/off/on switch between lb and sb and will it matter if gauge has backlight on/off switch ?


will this do it?


http://www.ebay.co.uk/itm/Car-Van-Boat- ... 27bc09f39b

Hi,the centre pin will be the feed to the gauge,the left or right pins will be the feed to the switch from the sb and the lb.

Cheers.

[missfixit70]

Looks like the gauge you've linked to can be supplied from the same source as it's measuring as wel as using a seperate source, so as it has 4 leads, that should be 2 leads for measured & 2 for supply, you should be able to put those together to make 2 input leads which will be a positive from the separate on off on switch & an earth, then you just need a fused supply from the LB & a fused supply from the SB to the on off on switch. I used a small toggle switch.

I got one like this http://cgi.ebay.co.uk/20V-DC-ON-OFF-BLU ... 286.c0.m14 rigged it with a small on-off-on toggle switch so I can check LB & Starter battery. Mounted it in the small storage cubby above the fuse box, had to trim the corners to make it an interference fit, but it works & looks great.

[missfixit70]

Just a thought, if you're fitting an on off on switch, is there any need to have a unit with an illumination switch built in to save power? You can just switch it off

[nigelgibson]

mmmm.... yup. you're right , i'll get one without backlight switch and put on/off/on switch in there. wiring sounds relatively simple [ it needs to be ! ]

thanks folks !

[Simon Jones]

Quite a lot of info on this thread:

http://www.igmaynard.co.uk/bongo/forum/ ... r&start=30

If you scroll down a bit you'll see some meters I bought which look to be very similar to yours.