Tacho Universal Relay not clicking

[z786]

Hi, i managed 2 accidentily join 2 wires on the 912 cable while the tacho was powered up

now the problem is i can only do diag corrections and nothing else, when i try 2 do something like 206 diag there isnt any power supplied 2 the wires

also the relay doesnt click anymore

anybody knw which part 2 replace on the circuit board???

thanx

[z786]

Any1?????????????

[Meat-Head]

that was intelligent of you.

No idea, upload some good photos of the board for a laugh.

See if we can play "spot the damage" lol

[z786]

iv been playing that since posted, changed a diode, worked for 2 seconds then back 2 normal

then me being me, lost my temper and smashed the thing

new 1 on its way lol

[Meat-Head]

iv been playing that since posted, changed a diode, worked for 2 seconds then back 2 normal

then me being me, lost my temper and smashed the thing

new 1 on its way lol


Back EMF diode swapped it with a zenner or a lower rated/dud one lol

[z786]

sorry cudnt figure that riddle was that instructions 2 repair it? lol
it was a shkotty diode mate

[bram380]

Usually the driver transistor is damaged.

[z786]

i cant understand schematics 2 complicating 4 me, but thanx anyways

[electromech]

Why not do what i do and just smash doors down .............. and yes I am one door short after last week loosing a dam chip

[z786]

usually try not 2 break anythin, always works out 2 be more expensive in the end lol

[n599fbm]

Hi,

Changing the two chips (IC111 and IC112)and adapter new relay,

Rgds,

C.

[z786]

the tacho "did" work, jus diagnostically, not manual jobs
so replacing the ic wudnt make any difference