[Solved] Simson S50 1989: Front & Rear Light Issues with 6V Electrical Installation, Possible Coil Damage

Hello, I have a Simson S50 1989 with 6V electrical installation. Recently, I noticed that I have no light in the front and back. The STOP light works. I checked the bulb in the back are functional, I replaced it with the STOP bulb. I don't know if there is a problem with the ignition, the circuit is broken, or is the light coil damaged? Where can I start my diagnosis?
I have a question, but if it turns out that the coil of lights is damaged, do you need to set the ignition again when replacing it?

Regards.

First check the cables, inserts at the ignition switch, whether the weight is good. Try to connect the lights directly from the coil, as it will be a good coil, if not the ignition switch.

forest_89 wrote:

I have a question, but if it turns out that the coil of lights is damaged, do you need to set the ignition again when replacing it?

No, you take off the magnetic wheel and you have access to the coils. If you have to remove the magneto base, mark the position relative to the engine block and place it the same.
Alternatively, you will need to adjust the interrupter gap when removing the spark gap.

In Simon, the front light is powered from a coil other than the rear one. one supplies the front light the other rear light, stop speedometer lighting. The front power comes to pin 59 of the ignition, goes out of 56.

Hello, today I checked this electrical installation in Simon with a meter.
At the output of the 4V ignition coil
At the output of the coil from a 6V stop light
On the other two 2.5V and 0V cables.

Do I have something mixed up in the wires, wrongly connected to the ignition? damaged coil?
The "stop" light glows elegantly.

I printed several simson installation diagrams and saw that two wires come out of one coil. Are these cables from the rear and front lights or stop lights?
I would like a connection diagram in the ignition switch, I am spreading my hands.
Regards

The stop light is supplied from the rear light, so something on the wires.

Ok, I'll see today. And I have a question, can you tell me exactly what simson model I have? year of manufacture 1989, 3-speed s50 engine, 6V installation with battery and indicators, because I do not know what wiring diagram to look for. As I bought a simson, in proof I have a simson s51 and the engine is s50. It is possible that the frame from s51 and the engine s50?

Regards.

Flatboat. Frame from S51 / 1, installation from S51, motor from S50

BANANvanDYK wrote:

Flatboat. Frame from S51 / 1, installation from S51, motor from S50

If it is 89, then rather S51. The scheme is the same, it doesn't matter too much. Can you take a photo of a simson?

Yesterday, using the diagram, I connected the pins from the coils to the ignition, the rear and front light is (although weak), there is no stop light. I took off the magneto, pulled out the ignition apparatus and noticed that the insulation of the wires is in a tragic condition, cracked, the wires rub against each other, maybe this is the reason because the output from one coil No voltage as measured by the meter. Today I will take to soldering and see what happens. If there is still no effect then the coil may be damaged? I'll take a photo of Simson.
Regards.

Here is the diagram The headlight coil is a red-white wire terminal 59 of the ignition switch. The tail light coil is a green-red wire.

Krzys55 wrote:

If it is 89, then rather S51. The scheme is the same, it doesn't matter too much.

In appearance, almost the same. The year 1989 was the S51 / 1 version where each version had a 12V installation, a completely different wiring diagram and a difference in the performance of several components. With electrics mainly other switches, rear brake stop light switch on the engine, electrical equipment in the right glove box.
In S51 / 1 and in some versions of S51 with 6V installation, the rear position light was supplied with a lighting coil, in others with a charging coil and a stop light.

Hello, yesterday I pulled out the base of the spark gap, re-soldered all wires on the coil outputs and noticed that on the red-yellow wire one wire was not soldered to the wire. The wires were cracked in the same place, as if the base of the sparker cut the insulation and maybe that the voltage was escaping to the ground. The wires were frayed. After soldering, proper wire insulation and installation of the ignition apparatus, the rear position light and the front lamp are lit. I am only surprised that the rear position light is connected to the lamp at the front. And as you said before it was STOP light, rear position light, the speedometer lighting should go from one coil and the front light from the other coil. Generally there are lights, only the Stop light is very bright and the rear position and the front lamp weaker.

Below are the photos of the simac you asked for.

Regards.

Added after 11 [minutes]:

Do you have SR50 front telescopes or windbreaker springs? If it is the latter, then it is better to change the springs to the original. MZA before your wheel falls out of telescopes.
In the pictures it looks more like the S50, only the frame with the documents comes from another model.

Why would it fall out?

The support tube must be inserted a certain minimum distance into the telescope shin. By increasing the length of the spring or / and lengthening the connecting rod, the support tube is inserted shallow, which first reduces the stability of the suspension, and secondly, if the suspension rebounds the other way, there is a greater risk of the support tube falling out of the shin. The design of Simson telescopes does not have a stroke limiter (telescope length) as in normal motorcycles, so replacing the springs means a different length of the telescope, and in the event of a spring break results in an accident of the shin from the support tubes called "wheel fall".

From what I remember when I exchanged lags, I have springs from SR50.

There is no such thing as SR50 springs. These things were invented by sellers, so what you have is a 100% windbreaker spring with a length of about 36 cm and a thin wire. All Simson models used the same springs with a length of 304 mm, only in S50 until 1979 they were slightly longer (317 mm). Install MZA springs (3.2 mm wire), in fact they are slightly longer (as for S50), but it will be a safer solution than these fakes. By the way, you will not have a problem with the stability of the vehicle placed on the central foot.

thanks for helping everyone. Re-soldering the wires solved the problem.