LED Conversion - snafus? Options

[mcbrems]

Hey All,

I swapped all of my bulbs for LEDs from Autolumination and/or
superbrightleds, and have encountered some unexpected issues. Replacing the
turn signal flasher was a known. I tried TimK's hack on the CF13 GL-02
flasher, and when installed and engaged, it just sat there, although the
hazard flashers worked fine (it seems to work on the same relay). I noticed
this aftermarket "LED" compatible relay design leaves out the "C" ground
pin, so I have a different one on order from Autolumination that has it.
When I raise my headlights, the tachometer dials up to 3-4K and then returns
to rest. My dash instrument lights have also been replaced with tiny LEDs
to match the originals, but they only flash once briefly when the light
switch is pulled. My blue high beam indicator is lit when the parking
lights are on, and my license plate lights never come on.

I picked up a 1974 color wiring diagram from Prospero's Garage (
http://stores.ebay.com/Prosperos-Wiring-Di...sid=p4340.l2563 ) and
noticed that many of the wires that connect to the computer are tied
together. I cut that part of the harness off and tied off all of those
wires individually (see image). I'm wondering if I need to reconnect some
of those wires to preserve the original circuit path.

<http://914electric.files.wordpress.com/2011/06/elect_danglies.jpg>
http://914electric.files.wordpress.com/201...ct_danglies.jpg

Does anybody have similar experiences? Also, is there a good source for the
factory color wiring diagram (Prospero's diagrams do not give terminal
designations for any switches - i.e. 56A, 56, C, 32, etc.).

Much thanks for any help.

(I was informed by Mikey at 914Rubber that there is another markb, so from
now on I will be:)
MCBrems

[Cap'n Krusty]

This mantra is gonna become reality sometime. Or maybe not: Ask good questions, get good answers.

The Cap'n

[mcbrems]

"Ask good questions, get good answers."

Here are the current flow diagrams. Couldn't find wiring diagrams for the '74.
http://www.pelicanparts.com/914/914_electrical_diagrams.htm

MCBrems

[914Mike]

"Ask good questions, get good answers."

Here are the current flow diagrams. Couldn't find wiring diagrams for the '74.
http://www.pelicanparts.com/914/914_electrical_diagrams.htm

MCBrems

Current flow is the best wiring diagram once you get used to it. Every circuit starts at the top with +12V and ends at the bottom with ground. And _EVERY_ detail is drawn.

With the early standard diagrams there are lots of confusing parallel runs and dead ends with numbers that go to a different page, and grounds just pop up wherever they want. The layout with everything positioned as it is in the car is nice, but ultimately just adds to the confusion.

If the RoadGlue forum ever gets put up here, there are lots of pics of my EV conversion process in the Alternate Power sub-forum. I'm still taking pics, but have no place to put them as yet. I have done a complete conversion to LEDs as well, and there are two gotchas:

1) The flasher relay (must be replaced with electronically timed version, which will not drive the dash turn signal bulb(s), or you must add load resistors). My solution used a GL-02 flasher, and for the dash turn signal bulbs involved adding a pair of arrow shaped LEDs to the trim plate, wired to the turn signal wires rather than the missing 4th pin on the flasher.

2) The headlight switch only runs the dash lights full brightness. LEDs can be dimmed, but simply cut off when using a simple rheostat like the headlight switch contains.

It sounds like you have mixed up some of the wiring on the gauges...