MG MGB and MGB GT Tech Talk
Like I said I am new at the MG thing and at the internet so please have patience. Today the wipers, fuel gauge, and marker lites quit, 20 min later while driving the wipers,gauge started again still no markers. any ideas.
Those are all switched circuit items, green circuit, I believe. My "come and go stuff" (VERY similar) quit doing it when I took out the fuse block and using soft wire wheel on grinder, buffed spade connections clean, wire brushed and crimped down all the female spade connectors slightly and put it back together, checked out all major grounds, fuse block fuses and in-line fuses.
Check out electrical info on this site. Get wiring diagram for your year and print out as large as possible at Kinko's or somewhere with good color printer, also print lists of Wire Colors (http://www.mgbexperience.com/service/lucas-colours.html) (also print on color printer) and http://www.mgbexperience.com/electrical/ where there is a ton of info. including core harness diagrams, diagnostic help, etc. Somewhere in there is also a list of components with related wire colors which is also very helpful.
If that circuit runs through the Hazard Switch then wire past the switch and see if it all works. On my 69 it is the plain green wires if I remember right. Hazard switch is frequent problem. There will be more and better answers than mine but all the background info suggested above will make it easier to understand the suggestions you get here. My learning curve has been so steep it was almost inverted but it get's easier. Good luck and keep posting.
JTB
John, a good place to start is the multi-ground connection in the engine bay on the right side near the fuse box. Take the clump of black wires off, clean the ring terminal and clean the body point that it makes contact with.
The best site for electrical info on the MGB is:
<http://www.mgcars.org.uk/electrical/>
Rick has done an amazing job of explaining and diagramming the system.
Wray, that is a great site. It help me a good deal, figuring out all my lighting.
