Hyper Flash Problem....Really Weird!!

In reading the threads on hyper flash, I haven't seen this problem come up......

A little background......2011 SCREW

Put duel color switchback bulbs with resistors in for the front turn signals, everything work great.

Added LEDs in the rear tail lights along with the reverse, license plate, 3rd brake and clearance lights (front). Then added resistors for each of the four tail light sockets, right side works good, left side no brake or turn signals, running lights work good. Also added HID head lights

Disconnected the resistors for the rear lights and put the stock tail lights back in on both sides, no change.....still no brake lights, turn signals on the left side. Then removed the front turn signal LEDs and resistors and installed stock bulbs.....still no change.

Checked all fuses and relays, all were good........checked the rear sockets with a meter, all wiring seems to be good, although with the blinker on the left side shows only 5-6 volts!

Has anyone ran across this before? Is my next step to have Ford reprogram the computer?



Thanks in advance for any ideas anyone may have!

the hyper flash has been an ongoing problem when replacing the turn signals in these trucks. normally the resistor would work, but for some reason trying to find the right resistance has proven to be a challenge for our trucks. i would revert back to stock on all flashing lights and see if the problem goes away. i dont think the dealer can reprogram anything for you though

The Car Stereo Company said:

the hyper flash has been an ongoing problem when replacing the turn signals in these trucks. normally the resistor would work, but for some reason trying to find the right resistance has proven to be a challenge for our trucks. i would revert back to stock on all flashing lights and see if the problem goes away. i dont think the dealer can reprogram anything for you though

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Tired to do as you suggested....still no brake, turn signals on the left side......even disconnected the battery over night, no change.

Even tried different resistors, using the front one that worked on the back, still no change.

I mentioned the dealer because I read somewhere a while ago about they could reprogram the CPU to get ride of the hyper flash???

where did you check fuses?

The Car Stereo Company said:

where did you check fuses?

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Passenger compartment
#13 Right turn/stop
#14 Left turn/stop

Engine compartment
#73 TT stop/turn relay power
#23, 37,38,39 Relays

all were good.

Do you think that the LEDs in the cab, etc may be the problem??

the cab shouldnt be a problem. its only the flashing lights that should be affected by this. i have led interior lights and they do not affect my turn signals at all

The Car Stereo Company said:

the cab shouldnt be a problem. its only the flashing lights that should be affected by this. i have led interior lights and they do not affect my turn signals at all

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That's what I figured also, but at this point I'm ready to run some new wiring back to the tail lights!!!

probably wont help. test power at the lights first.

The Car Stereo Company said:

probably wont help. test power at the lights first.

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Tail lights were 12 volts, turn signal was 5 volts and "flashing"* (which indicates a short?)
Didn't check the brake light as I was by my self.

Where do the turn signal wires start? at the lever/switch?

Edit: * "Flashing" with the turn signal on. Does only getting 5 volts indicate a short?

your digital meter may not be quick enough to get a full voltage reading. try using a test light instead. if you are still showing a low voltage, there might be other issues