Can anyone help?
I have an opcom car diagnostics cable and need to reflash the pic18f458 in circuit with my tl866 programmer.
Can someone please tell me what the best way is to connect the thin wires to the legs of the pic18f458?
Are there pins or something I can solder to the wires or is there something tailor made for doing this? Doesn’t seem there’s enough room for soldering etc. Thanks

 

Might not be possible if the ICSP pins are in use for other functions - without removing the chip from PCB.

or -3D print a pogo-pin adapter to probe the pins

or - solder wire-wrap wire to the pins.

 

These are a very nice option.

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I just received a set and they are very nice for the price. But, as @Sensacell points out, if the pins are in use you may need to decoder the chip to get access.

 

In your PCB the three pins seem to be connected somewhere.
If you order a new one, you program it, unsolder the current one and replace it. If things go wrong, you still have the original.

 

I can’t help but wonder if that multi-pin connector has connections to the programming pins. It might be worth checking continuity of those pins to reset, pclck and pdata.

Another possible problem is that they sometimes have alternate programming pins, which might be selected. Not sure if that processor has that option. Check the datasheet.

 

Also note that the chip probably has its programmed code protected so you cannot read it change something and reprogram it. Most likely you would need to write the whole code from scratch.