Sod's Law Of Land Rovers http://fuddymuckers.co.uk/wiki/ 2026-05-07T13:20:09+00:00 http://fuddymuckers.co.uk/wiki/ http://fuddymuckers.co.uk/wiki/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2019-05-15T23:33:59+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:alt_diode&rev=1557963239&do=diff Alternator Diodes LR put a diode in the alternator warning light feed to prevent back-feeding which can lead to the vehicle “running on” when there's not enough load on the ignition side circuit to pull the wire down to 0v when you turn the key off. text/html 2026-04-24T11:40:25+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:battery_specs&rev=1777030825&do=diff Battery Specs Nothing much of great interest here - mostly for my own notes so I can remember what I've fitted! General Table 5. CHARGING VOLTAGES OF LEAD ACID BATTERIES Charging Mode Voltage Range (V) Flooded Sealed VRLA AGM GEL text/html 2019-05-15T23:33:59+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:crimp_or_solder&rev=1557963239&do=diff Crimp Or Solder? NASA-STD-8739.4 - Crimping, Interconnecting Cables, Harnesses, and Wiring specifies BOTH are perfectly acceptable when done properly. :thefinger: Yes, that NASA. text/html 2024-12-06T09:20:34+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:fuses&rev=1733476834&do=diff Stuff you should know about fuses This video covers a lot of it. “...a 20A MAXI Fuse experiencing an overload of 100A will open in about 0.5 seconds. At 40A, the same 20A MAXI Fuse would open in about 9 seconds.” “... a fuse with a current rating of 10A is not usually recommended for operation at more than 7.5A in a 25 ̊C ambient text/html 2019-05-15T23:33:59+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:intermotor_fan_switches&rev=1557963239&do=diff Intermotor Fan Switch Part Numbers Attached is a list of INTERMOTOR switches that are readily available for this application (I have listed all types, but the M22 switches are of most interest) Part No. A/F Size Thread Temp °C 50480 19 3/8“ text/html 2023-06-05T13:34:21+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:old_twin_fans&rev=1685972061&do=diff Dual-speed dual-fan circuit Credit goes to Ian / Bull bar Cowboy from LR4x4 for designing this, I've copy-pasted it here for now. The new version using entirely Land Rover parts is here. Application Description Although this article applies to the Rover V8, you can easily adapt it to any engine if you know the normal operating temperatures. text/html 2024-05-23T10:31:07+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:overland_power&rev=1716460267&do=diff Power for your Overlander This seems to be a subject that people end up either over-complicating or spending vast amounts of money on. In recent years lithium power packs or so-called “solar generators” like the Jackary have been popping up at eye-watering prices, so I thought I'd jot down a few musings on all this and make a few suggestions. text/html 2024-05-23T10:16:04+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:start&rev=1716459364&do=diff Automotive Electricals I seem to end up doing a lot of wiring and whatnot, so I'm collecting all the bits and bobs here. * Megasquirt EFI gets its own section as I'm a serial megasquirter * Defender blade fusebox upgrade * Defender twin electric fan conversion - Using 100% Land Rover parts. * Old dual-speed twin-fan circuit designed by Ian / BullbarCowboy from LR4x4 text/html 2019-10-16T13:36:40+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:vdo_temp_gauge&rev=1571233000&do=diff VDO temp gauge As used on the ambulance 4.6 V8 conversion; VDO Vision gauge was 310010002, sensor is 323801005001, 0 to 120 degrees centigrade. Has 1/8NPT thread and 801/5/1 stamped on the hex head. Deg C Ohms 50 322.8 68 179.5 80 112.5 100 text/html 2019-05-15T23:33:59+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:vir&rev=1557963239&do=diff Electrical Units Explained Badly It has become paaaaiiiiinfully clear to me, whilst researching solar panels and power systems in general that no-one on the internet really knows the difference between watts, volts, amps, amp-hours, watt-hours, and a hole in the ground. The internet also doesn't know the difference between an amusingly shaped root vegetable and a viable marital aid but that's a discussion for a different website. ( text/html 2023-06-05T13:31:14+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:voltage_vs_health&rev=1685971874&do=diff Why battery voltage is not a good indicator of battery health Because batteries are far harder than you think Being the sort of geek I am, with access to an actual programmable load tester and TSD's python scripts, I'd actually load-tested the Trojan battery before I fitted it in May 2016 (it was already old then, maybe 10 years by the date label!), comparing the result when I finally removed it shows how performance degrades massively but the battery voltage at idle (no load) is almost identi… text/html 2025-07-08T10:11:11+00:00 Anonymous (anonymous@undisclosed.example.com) http://fuddymuckers.co.uk/wiki/doku.php?id=electricals:wiring_colours&rev=1751969471&do=diff Lucas / BS / Land Rover standard wiring colours Land Rovers and many other British cars use the “BS-AU7a 1983 Colour Code for Vehicle Wiring” or some variations of it. Thanks to Monkie for posting this on LR4x4. There's also a PDF on Autosparks website if you want something printable: AutosparksBSCC.pdf A solid colour is from a supply to a switch and a striped colour is switch to component. I have used the standard lucas colour code: G=green, LG = light green, R=red, U=blue, W=white, O=ora…