Miatav8,MstrASE,A&P,F wrote:
I see it now. The relays he selects may have internal diodes for the collapsing field voltage spike. Looks like the way to go but for the sake of discussion, I will continue. Had to go back and read since I have not been following and went straight to the schematic when I saw you asked me to look.
Thanks for the confirmation
The 5 amp fuse assumes all leds and incandescent instruments. If using the oem cluster and wiring off the park function, the load is 4x3.8watts/14vdc=1 amp, leaving roughly 4 amps for four led lamps. I buy bags of 194 replacement leds and use them for everything. I use radial and spot arrangement leds depending on the cluster design for best lighting and clearance. I don’t know what instrumentation he is using.
Agreed that it is no t a problem
The other black wire is not connected, since he is not using the wiper function. If they were connected internally, there should be only one black wire. A continuity check would confirm but there is no need.
I'm not sure about the "not using the wiper function". Wiper or no wiper, continuity test would be good to do for peace of mind in case of future needs.
Mnot, regarding the smoking wiring comment, I’ve had many na miatas and never had an issue with the oem wiring config. However, it is not uncommon for people to install higher output lamps that draw more current then blame the car mfg. Head light bulbs with more watts equal more amps for a given voltage x 2. If the oem system doesn’t last 200,000 miles of normal use then there is or was a maintenance issue or mod at some point that led to the failure.
I've never had problems with OEM headlight wiring either, provided staying within OEM designed power loads. Many add relays to their Brit cars just because "Lucas", age, and DPO's wiring deficiencies
There are plenty of na miatas or other mazdas in junkyards that you can source the switch connectors from. Look for vehicles that use the same switch. If there are none in your area, find a miata parts seller on ebay and ask to buy the connectors with as much wire as practical for splicing.
Good idea
Thanks!
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