I have 2 different types of LEDs in a castle model I am constructing. The first LED is a yellow flickering LED that I have approximately 30 of working off 2 "D" size batteries with no need for resist

There are a few possible reasons why the LED headlights on your 1996 Chevy S10 might be flickering:

1. The LED bulbs might be incompatible with your vehicle's electrical system. If the LED bulbs are not specifically designed for use in your S10, they may not work properly and could cause flickering.
2. There might be a problem with the vehicle's electrical system. If the electrical system is not providing a stable power supply to the headlights, they may flicker.
3. The LED bulbs might be defective. If the bulbs are flickering even when they are not in use, they may be faulty and need to be replaced.

To fix the flickering problem, you will need to diagnose the root cause. Start by checking to make sure that the LED bulbs are compatible with your S10. If they are, try replacing them with a different set of LED bulbs to see if this fixes the issue. If the problem persists, you may need to have your vehicle's electrical system checked by a mechanic.
I hope this helps! Let me know if you have any other questions.

bad cluster?
BAD WIRING TO IT
LOOSE FUSE TO IT.?
is LED back lamps
or some odd, speed led that make curved virtual MPH display.
try to know we can not see your LED nor what country it is.
some cars in other countries use totally different clusters.
scan the PCm yet to see if VSS speed sensors are failing.
we always can first after all if it knows what is bad, why would you ever want to not know that?

Hey Ronald, Try reseating the LED Bulbs. Depending of the bulbs a polarity change might cause them to flicker faster.
The original bulbs were working off a flasher or relay already. Put Hazard signals On see if the same thing happens. Or simply get the original bulbs back in.
You can also try calling the manufacturer of the LED light bulbs with the model number.Let me know what happens.
Good Luck,
JP
PS I have added a link that may help you. https://www.superbrightleds.com/blog/led-turn-signals-blinking-too-fast-hyperflashing/275

I am not familiar with the model but there are a number of ways instruments can be illuminated - a variety of standard incandescent bulbs being a favourite for manufacturers. That type of bulb is a vacuum type that will sooner or later become silvered or blackened resulting in a much reduced light output and an increased bulb temperature that if left unattended can destroy the plastic surrounding the bulb.

A few manufacturers have used a single light source and fibre optic strands to transmit the light into the instruments. The light source was often a vacuum incandescent bulb but could also be an led.

Leds are more common in modern cars than bulbs and are a low voltage device and so either a voltage regulator must be employed to supply the correct voltage to the leds or the leds could be daisy-chained in a series circuit and supplied by battery voltage or a combination of both.
In this case a tired regulator or a tired resistor or other components could lower the voltage supplied to the leds or in the case of a series circuit, a failed led will put an entire circuit into darkness.

I strongly suggest you obtain a wiring diagram prior to starting work so you know what you are facing...

you need the check your kit bulbs / ballast [ or retrofit kit depending on manufacturer ] that they are compatible with your vehicle most are designed to retrofit with halogen type systems

Congratulations, check you brake fluid.

With the explanation of nik you can solve the problem. All you need is a multimeter to measure the consumption of one LED an then you can determine the value of resistors and power of battery. Here is an electric circuit for you to figure the hole connection needed. It is advisable to divide the circuit in blocks in order lo achieve better performance. If one led became short circuit, only the segment where is located will be off. The requirements of power for resistors will be easier too. You can even divide in bore blocks, depending on the power of LEDs.

You can go from 2 aaa'a three two D's depending on how long you want the battery's to last or project size. Depending on LED model 98% don't matter on the amps just the voltage. I was using 2 D's so you would have about 24 - 36 hour straight on time.. But if you could afford 4 of them for testing. Run four in line so the voltage will be 12 volts total and hook it up to your car battery and you should/would have a light for 6 months to a year and the LEDS should be just fine.

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Infrared remote control
NOTE: Infrared emitter can be seen at front edge of key.
System operation
Switch ignition ON. Ensure clock LED illuminates for 3-5 seconds. Pressing key lock button once activates central locking and alarm. Pressing key lock button twice within 3 seconds activates double locking system.
Programming
When
Key batteries completely discharged. Key batteries not replaced within 15 seconds. Key added or replaced. System malfunction.
How
Obtain all keys fitted with remote control. Turn ignition switch to position I. Wait approximately 10 seconds. Ensure clock LED illuminates.
NOTE: LED illuminates for approximately 5 seconds.
Switch ignition OFF and remove key, while LED illuminated. Programming mode activated for approximately 20 seconds (LED illuminated). Proceed as follows: Point key at receiver (located near interior lamp). Press and hold unlock button Fig. 1 [1]. After approximately 1 second key LED will flash once [3]. Press lock button 3 times Fig. 1 [2]. Release unlock button Fig. 1 [1]. Continue to point key at receiver until LEDs in clock and key have flashed 5 times. Ensure LED remains illuminated. Repeat above procedure within 20 seconds to program remaining keys. To exit programming mode and extinguish clock LED: Switch ignition ON and OFF. Wait approximately 20 seconds.
NOTE: A maximum of 4 keys can be programmed. Fig. 1
Radio frequency remote control
System operation
Switch ignition ON. Ensure clock LED illuminates for 3-5 seconds.


Pressing tailgate release button twice within 3 seconds unlocks the tailgate - if fitted. Pressing key lock button once activates central locking and alarm. Pressing key lock button twice within 3 seconds activates double locking system. Interior lamp illuminates when disarming system.
Programming
When
Key added or replaced. System malfunction.
How
Obtain all keys fitted with remote control. Fasten seat belts and close all doors. From position I, turn ignition switch as follows: To position II. To position I. To position II. To position I. To position II. To position I. Programming mode activated for approximately 20 seconds. LED or fog lamps ON warning lamp illuminates (some models) or the system will emit an acoustic signal to indicate start of programming mode. Proceed as follows: Type 1: Press and hold unlock button Fig. 1 [1]. Type 2: Press unlock button Fig. 2 [2]. Ensure clock LED or fog lamps ON warning lamp flashes (some models) or wait for acoustic signal (indicates correct programming). Wait 2 seconds. Repeat above procedure within 20 seconds to program remaining keys. To exit programming mode: Switch ignition ON. Wait 20 seconds.
NOTE: A maximum of 4 keys can be programmed.

Programming
When
Key batteries completely discharged. Key batteries not replaced within 15 seconds. Key added or replaced. System malfunction.
How
Obtain all keys fitted with remote control. Turn ignition switch to position I. Wait approximately 10 seconds. Ensure clock LED illuminates.
NOTE: LED illuminates for approximately 5 seconds.
Switch ignition OFF and remove key, while LED illuminated. Programming mode activated for approximately 20 seconds (LED illuminated). Proceed as follows: Point key at receiver (located near interior lamp). Press and hold unlock button Fig. 1 [1]. After approximately 1 second key LED will flash once [3]. Press lock button 3-5 times Fig. 1 [2]. Release unlock button Fig. 1 [1]. Continue to point key at receiver until LEDs in clock and key have flashed 5 times. Repeat above procedure within 20 seconds to program remaining keys. To exit programming mode and extinguish clock LED: Switch ignition ON and OFF. Wait approximately 20 seconds