Earlier vehicles had a resistor that was placed in series with the headlamp bulb in order to reduce the voltage across the bulb, and hence reduce the light output. The problem with this solution is that the resistor will get hot and you need to make sure it can 'sink' the heat away. Hence they are usually under the bonnet where they can be cooled, it won't set light to sat navs trousers
Later vehicles such as my 95 +8 had this 'relay' module that places the dip beams in series, thus halving the current, quarter the power, and somewhat less than a quarter of the light output from the bulb In addition to the explanation I posted on Moganatica I do have a few photographs somewhere on my network store, I will have a look tonight The odd thing about your installation is that I believe you reported that the headlamps had pilot bulbs, which would not have been necessary in the case of dim/dip. Are these pilot bulbs wired up ? or is it a set of replacement headlamps which have pilot bulbs which are not wired ? could of course be a transition period in the Morgan works, later headlamps, but an earlier harness. These later dim dip relays are up behind the dash ? just a fairly anonymous black box about the size of a cigarette packet. Best wishes Mike Smith > Thanks for your replies. > > Gosh, I had completely forgotten about such things and now I've been > reminded I would have expected a 1997 car to have lost them; but then > this is a Morgan. > > I found the explanation on Morganatica so 'thank you' to the person > who put it there.. > > Tomorrow I'll take a look to see where the unit is hidden in case one > day I need to know. > > Cheers, > Lawrence > > -----Original Message----- > From: Graham Wright [mailto:[email protected]] > Sent: Thursday, April 26, 2012 7:59 PM > To: mogtalk2 > Subject: Re: [mogtalk2]side lights > > > You have a "dim-dip" unit by the sounds of it Lawrence. > > Frequently a source of angst when they go wrong. > > Cheers, > Graham W > > > > ------------------------------------------- > View posts on The Mail Archive > http://www.mail-archive.com/[email protected]/ > [http://www.mail-archive.com/[email protected]/] > > Modify Your Subscription: https://www.listbox.com/member/?&; Powered by > Listbox: http://www.listbox.com ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?&; Powered by Listbox: http://www.listbox.com ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?member_id=22459785&id_secret=22459785-4a39ddf8 Powered by Listbox: http://www.listbox.com
