rangerovers.pub
The only place for a coil spring is up Zebedee's arse
Member
Joined:
Posts: 31

Hello All,
I replaced my blend motor trio and now the display on the HEVAC does not light up. All of the other buttons do light up when engaged and seem to be working. The blend motors, I believe, are working. I took out the green-based display bulb/holder and if I wiggled it, there was continuity. When I put it back in, still no display. I previously sent HEVAC unit off to California to be fixed ($200) and display worked. Have ordered bulb/holder (2.0w) part number 62-11-1-375-774-M97, brand is Osram-Sylvania, from Pelican Parts (http://www.pelicanparts.com/) as there are no RRs in breaker yards here in Memphis at present.

There are no green-based bulbs in the speedometer/instrument cluster (black-based are 1.2w and the base is different). Is there another component in the Rangie that has the green-based bulb to substitute for a test of the display in the meantime?
Thanks,
Vancer

Member
Joined:
Posts: 17

if it is only for testing the lower wattage is not an issue, the different base might be.

Sometimes the bulb is simply stuck into the base, sometimes it is pointwelded to the contacts..... if it is stuck in, you can pull it out and stick a 1,2w standard T5 socket bulb in and try if that lights up.

You allso can take a multimeter and measure if the contacts on the print have voltage.

Member
Joined:
Posts: 31

Hello Roger-B,
Put bulb back in, hooked up the Instrument Panel, turned key, no display. Wiggled unit and got a display. NO CHEQUEBOOK/Bookmark!!! Will replace when new bulb comes in. I gave the Pelican Part number previously. The Land Rover part number is STC3869. Pelican Parts was $2.25 + $4.25 shipping (I bought 3). On eBay, one goes for as much as $11 with free shipping from cheaplrparts.
Thanks for your input. Happy New Year!
Vance

Member
Joined:
Posts: 1245

From memory the lamps are fixed into the base, so you can't easily take the lamp out.

I replaced mine with LED's but I had to salvage the old lamp base to be able to use that as the connection - though I don't see any reason why you couldn't solder to the actual metal power feeds.

You can test the lamp out of the vehicle by putting it across something like a 9v battery. If it lights up and the lamp is ok, then it could be a wiring problem between the HEVAC and the instrument cluster, as it controls the illumination of the HEVAC LCD aswell, to allow it to be dimmed when the sidelights are turned on.

If the lamp doesn't light up, then it will need replacing, and if you can't find one state-side that fits, then I know they sell kits here in the UK on eBay which have all of the 4 lamps in them to do a complete swap out. I am sure there are places here that would ship internationally to you.

To answer your question though, no, there isn't anything else in the RR that uses the same lamp as the HEVAC display that you can swap it into for testing unfortunately :(

Member
Joined:
Posts: 31

Hello,
Bulb came in the mail and I put it in. The Pelican Parts green-based bulb is rounded-over/rectangular, not like the hex shape of the OEM. It's actually a BMW bulb. Nonetheless, it fit the Climate Control Unit. Now it lights up correctly with no Chequebook/Book with Exclamation Point ("Bang" in computer speak) so replacing the blend motors solved that.

I had feared I might have done something to mess up the Climate Control Display. Not so, all is well. Thanks for your help.
Vancer

Member
avatar
Joined:
Posts: 7135

You're welcome. That's what a forum is for.