LED turn signal suggesions?
09-27-2013, 10:22 AM
#16
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Please note Ed specified the 45's not the 18's the 18's are not bright enough in direct sun or in the dark w/bad weather for Turn sig's or Brake lights, they are good for running light only! (18 SMD's vers 45 SMD's).
I run the 45's for brake and turn and 18 for running, everyone I've asked says they are very bright even in direct sun, not so when I used the 18's
Running 18's you risk people not seeing your turn signal, replace them with the 45's.
Dave
I run the 45's for brake and turn and 18 for running, everyone I've asked says they are very bright even in direct sun, not so when I used the 18's
Running 18's you risk people not seeing your turn signal, replace them with the 45's.
Dave
08-28-2016, 11:47 PM
#17
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While helping somebody with a light-related problem today, I was reviewing my old PMs and came across some material that I thought I should add to this thread for future reference. It extends my remarks I made in post #5 in this thread with some more details.
Originally Posted by Ed Scherer
I just went out and took a look at my two tail light assemblies. In both cases, the turn signal sockets have one blue wire coming out (+12 V when the lamp is to be illuminated) and two brown ground wires. The load resistor should be wired across that blue wire and any brown wire (one of those two ground wires on the same socket are probably the best choices).
The original 928 turn signal relay uses double-speed blinking to indicate a burned out bulb; this mode may (probably will) also be triggered by using LEDs instead of incandescent bulbs for the turn signals, since they cause less current to flow. I recommend replacing the stock relay with a Super Bright LEDs CF13GL-02 LED Bulb Electronic Flasher and using one 25 Ω load resistor at each of the rear tail light assemblies.
You might want to check the grounds (typically, brown wires) to make sure they're really wired together properly. Some of the "wiring" is internal to the bulb sockets (e.g., you'll see two brown wires on the stock turn signal bulb socket; these just connect to different points on the metal ring forming to outer part of the socket).
In case it's of use, I took photos of the backs of both of the tail light assemblies off my '90. You can click the photos to get much larger versions. If nothing else, they're at least useful to see what all the modifications look like. It's probably hard, if not impossible, to actually make out the details of the wiring since some wires cover up other ones.
The left tail light assembly, which includes modifications to use 1157-style bulbs for all 3 brake light positions, and also has a 25 Ω load resistor installed across the turn signal bulb wiring:
The right tail light assembly, which includes modifications to use 1157-style bulbs for all 3 brake light positions, also has a 25 Ω load resistor installed across the turn signal bulb wiring:
The original 928 turn signal relay uses double-speed blinking to indicate a burned out bulb; this mode may (probably will) also be triggered by using LEDs instead of incandescent bulbs for the turn signals, since they cause less current to flow. I recommend replacing the stock relay with a Super Bright LEDs CF13GL-02 LED Bulb Electronic Flasher and using one 25 Ω load resistor at each of the rear tail light assemblies.
You might want to check the grounds (typically, brown wires) to make sure they're really wired together properly. Some of the "wiring" is internal to the bulb sockets (e.g., you'll see two brown wires on the stock turn signal bulb socket; these just connect to different points on the metal ring forming to outer part of the socket).
In case it's of use, I took photos of the backs of both of the tail light assemblies off my '90. You can click the photos to get much larger versions. If nothing else, they're at least useful to see what all the modifications look like. It's probably hard, if not impossible, to actually make out the details of the wiring since some wires cover up other ones.
The left tail light assembly, which includes modifications to use 1157-style bulbs for all 3 brake light positions, and also has a 25 Ω load resistor installed across the turn signal bulb wiring:
The right tail light assembly, which includes modifications to use 1157-style bulbs for all 3 brake light positions, also has a 25 Ω load resistor installed across the turn signal bulb wiring:
08-29-2016, 02:17 AM
#18
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When was the last time you had to replace an analog turn bulb on the exterior of the car? is it really worth the effort?..adding resistors...etc... the few amps less it draws wont make your car any faster...any cooler looking. best time spent with LED bulbs is overhauling the interior ambient and dash/console lightining and Ed here has that dialed in!
each his own
each his own
