Hi. i have a 1980 chevy elcamino. turn signal light does not flash on right side. light does come on. left side works like normal. hazards work fine....i beleave one flasher works for both sides...any ideas?

The smart flasher (GMSF) is an automotive flasher designed to accept turn, hazard, and brake inputs. The GMSF will provide corresponding outputs to the exterior lamps and instrument panel turn signal indicator lamps. This lighting system has dedicated lamps for the turn/hazard functions and dedicated lamps for the brake function. The system incorporates the use of flash rates for diagnostics. The flash rate is a calculation of the number of flashes that occur within a 60 second period. This system uses a percentage of on-time to off-time called duty cycle. For the bulb outage condition, the indicator of the vehicle side on which the outage occurs shall assume bulb outage flash rate mode. The opposite side indicator will assume the normal flash rate mode for an input from the non bulb outage side of the vehicle. Hazard warning lamp outage will maintain a normal flash rate as long as 2 or more exterior signaling lamps are functional. During all modes of operation, the IPC will receive the same flash rates and duty cycles that the exterior lamps receive. The IPC will then control the indicators in the cluster. The vehicle operator will be provided with an audible and visual indication of the flasher operation. Below is a table with flash rates and duty cycles:
Operating Condition
Flash Rate
Duty Cycle
Normal
75 to 105 flashes per minute
45% to 55%
Turn Signal Lamp Outage
2 or 3 times faster than normal flash rate
35% to 55%
The IGN E fuse in the engine wiring harness junction block supplies Ignition positive voltage to the turn signal switch assembly. With the ignition switch in the RUN or START position, ignition positive voltage is connected through the turn signal and hazard switch assembly to the GMSF which is powered by the FLASHER fuse also in the engine wiring harness junction block and is grounded at G201. When the turn signal switch is placed in either the left or right position, the circuit is complete from the GMSF to the turn signal lamps and to ground. The GMSF then sends an on-off voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator. When the hazard switch is pressed, all turn signal lamps will flash including both IPC turn indicators. The front turn signals are grounded at G103 and G107. The rear turn signals are grounded at G401 and G402.
The IPC illuminates the TURN SIGNAL ON indicator in the driver information center when the IPC determines that the turn signal is active for more than 1.2 km (0.75 mile). The IPC also sends a class 2 message to the radio in order to activate the audible warning.
On vehicles equipped with the outside rear view mirror turn signal lamps, the turn signal voltage is also sent to the respective front door module. The door modules then distribute power and ground to the activated lamp.
For trailer wiring, separate turn signal circuits are connected through the GMSF to the trailer wiring harness.

Just left side front and back are not working?

It could need a new turn signal / hazard flasher module.

Only the bulb is linked with those seperate items the bulb runs both blinker and hazard normally one goes both go when u have tufrn signal on inside if u hear it flashing fast its ur bulb

Hey Bob how's it going ? I have been looking at Chevy service info for your vehicle and this a little on the complex side or that is the way it sounds from the turn signal description !
Turn Signal Lamps
The smart flasher (GMSF) is an automotive flasher designed to accept turn, hazard, and brake inputs. The GMSF will provide corresponding outputs to the exterior lamps and instrument panel turn signal indicator lamps. This lighting system has dedicated lamps for the turn/hazard functions and dedicated lamps for the brake function. The system incorporates the use of flash rates for diagnostics. The flash rate is a calculation of the number of flashes that occur within a 60 second period. This system uses a percentage of on-time to off-time called duty cycle. For the bulb outage condition, the indicator of the vehicle side on which the outage occurs shall assume bulb outage flash rate mode. The opposite side indicator will assume the normal flash rate mode for an input from the non bulb outage side of the vehicle. Hazard warning lamp outage will maintain a normal flash rate as long as 2 or more exterior signaling lamps are functional. During all modes of operation, the IPC will receive the same flash rates and duty cycles that the exterior lamps receive. The IPC will then control the indicators in the cluster. The vehicle operator will be provided with an audible and visual indication of the flasher operation. Below is a table with flash rates and duty cycles:
Are all your bulbs good ?
Operating Condition
Flash Rate
Duty Cycle
Normal
75 to 105 flashes per minute
45% to 55%
Turn Signal Lamp Outage
2 or 3 times faster than normal flash rate
35% to 55%

check fuses or the turn signal switch is bad

lol sounds like my old truck most likely crossed wires

Are you sure the right side bulbs all flash? You say you replaced all the bulbs? Why would you replace bulbs that were working? Did you have this problem before you replaced the bulbs, or after. The hazard flasher is down under the dash, left side, turn the signals on and follow the clicking noise.The hazard flasher and the turn signal flasher should be near each other, and are interchangeable. If it clicks fast, a bulb or a bad socket is usually the cause. These trucks have a lot of problems with the tail light circuit boards.

I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!

if the right side blinks normal, the flasher MAY be OK?? do the hazard lights flash all lights?it should. make sure you have all the correct bulbs. if so, replace the flasher unit. if the right side works turn it on and follow the ticking to find th eunit.

If the fuses are good and the front and rear bulbs are good, change the flasher for the turn signals, even tho the right is working. If that doesn't fix the problem, it might be in the turn sgnal switch on the steering column.
If both bulbs are good for the backup lights and fuses are good, then the backup light switch, which is screwed into the side of the transmission has to bad.