Allisonscattergood
New Member
B&G windspeed violet wire from masthead not connected? The connecting wire doesn't have a violet, can it be doubled up with another colour?
- Thread starter Allisonscattergood
- Start date
jbweston
Well-Known Member
I'm sorry I don't know the answer.
I had B & G kit on a previous boat. Those lovely old analogue gauges. But the fact that B & G didn't produce wiring instructions for their users did my head in. It belonged to an earlier era when manufacturers treated basic information as a trade secret that only their favoured (and paying) technicians were admitted to, so holding the customers over a barrel.
Possibly what you want is available now as the secrets tend to leak out.
I swapped everything out for Tacktick and Furuno, who did allow their valued customers know how to connect up what they had bought without employing someone who was in the secret society.
I had B & G kit on a previous boat. Those lovely old analogue gauges. But the fact that B & G didn't produce wiring instructions for their users did my head in. It belonged to an earlier era when manufacturers treated basic information as a trade secret that only their favoured (and paying) technicians were admitted to, so holding the customers over a barrel.
Possibly what you want is available now as the secrets tend to leak out.
I swapped everything out for Tacktick and Furuno, who did allow their valued customers know how to connect up what they had bought without employing someone who was in the secret society.
Refueler
Well-Known Member
I feel your pain ..... I have B&G Wind that defies all .... I've had yard people at it ... still not working properly.
TSB240
Well-Known Member
No it is the windspeed pulse from your mast head sensor. Is there another cable somewhere with a violet core? Are you sure you are connecting to your wind instrument?
TSB240
Well-Known Member
My guess is you have a newer mhw unit fitted to an older instrument.
I assume the cable with the violet core is to the mhu and the cable without is to the instruments.
If my theory is correct disconnect all the mhu cores from the chocblocks.
Check you have positive 12v on the red core from the instruments. Test with meter probes between it and the green wire from the instruments.
If that is the case then rewire as follows. If not I am wrong! So don't!
The red wires connect together 12v
The yellow wires connect together (red phase wind dir)
The violet wire mhu should connect to the blue wire on instrument (wind spd)
The green wire mhu should connect to the white wire on inst (green phase wind dir)
The blue wire mhu should connect to the black wire on inst (blue phase wind dir)
The black wire mhu should connect to the green wire on the instrument 0v
Ignore the white core from the mast head unit tape it back onto the outer sheath.
I assume the cable with the violet core is to the mhu and the cable without is to the instruments.
If my theory is correct disconnect all the mhu cores from the chocblocks.
Check you have positive 12v on the red core from the instruments. Test with meter probes between it and the green wire from the instruments.
If that is the case then rewire as follows. If not I am wrong! So don't!
The red wires connect together 12v
The yellow wires connect together (red phase wind dir)
The violet wire mhu should connect to the blue wire on instrument (wind spd)
The green wire mhu should connect to the white wire on inst (green phase wind dir)
The blue wire mhu should connect to the black wire on inst (blue phase wind dir)
The black wire mhu should connect to the green wire on the instrument 0v
Ignore the white core from the mast head unit tape it back onto the outer sheath.
Refueler
Well-Known Member
IF the MHU is dishing out NMEA as the later ones do - then the old Analogue display will not work with it .. its a pulse / voltage driven display.
I have this problem that I can get a replacement 300 series MHU for about 300 notes .. but the one I actually need - 213 series- is 1000 notes .. or 2nd hand at about 400 ...
The two types are not compatible. Maybe OP has got hold of wrong MHU ?
Old analogue requires a 213 MHU
Later NMEA requires the later 300 series MHU.
I have this problem that I can get a replacement 300 series MHU for about 300 notes .. but the one I actually need - 213 series- is 1000 notes .. or 2nd hand at about 400 ...
The two types are not compatible. Maybe OP has got hold of wrong MHU ?
Old analogue requires a 213 MHU
Later NMEA requires the later 300 series MHU.
TSB240
Well-Known Member
As always we could do with some more info!
The exact model of mhwu and instrument is always more informative but sometimes difficult to establish. It is also good to have some history and background for the installation. Has it been connected and working before as it is?
I have assumed it is a network instrument.If that is the case then the cable colours shown in the photo were only used and supplied for 2 months of 1996!
The White core is not used on any of their earlier or later mhw units suitable for network Instruments as shown in the previously attached pdf.
B and G were never very consistent with their cable colours and for those two months they also decided the wind speed should be blue!
All other years until the nmea units took over the network mhw units and instruments the windspeed was violet.
I very much doubt the mhw unit is an nmea unit as they don't have as many cores usually 4 at most.
The exact model of mhwu and instrument is always more informative but sometimes difficult to establish. It is also good to have some history and background for the installation. Has it been connected and working before as it is?
I have assumed it is a network instrument.If that is the case then the cable colours shown in the photo were only used and supplied for 2 months of 1996!
The White core is not used on any of their earlier or later mhw units suitable for network Instruments as shown in the previously attached pdf.
B and G were never very consistent with their cable colours and for those two months they also decided the wind speed should be blue!
All other years until the nmea units took over the network mhw units and instruments the windspeed was violet.
I very much doubt the mhw unit is an nmea unit as they don't have as many cores usually 4 at most.
Last edited:
Refueler
Well-Known Member
It appears that in 1996~ EU required change of wiring from 6 pin to 7 pin ..
This meant that the old 283 / 496 MHU's and early 213's became incompatible with the later mounts.
Attached is the wiring configs.
Also a guys work to get round this ...
B&G Network MHU 496 wire and pin changes
This meant that the old 283 / 496 MHU's and early 213's became incompatible with the later mounts.
Attached is the wiring configs.
Also a guys work to get round this ...
B&G Network MHU 496 wire and pin changes