Need help electrical suzuki gs850 1980.

Got a spanner in the works? Post your motorcycle problems here.
Post Reply
Adamski123
Posts: 5
Joined: Sun Apr 25, 2021 10:00 pm
Location: Basingstoke
Has thanked: 1 time
Been thanked: 1 time

Need help electrical suzuki gs850 1980.

Post by Adamski123 »

Hey guys, I'm new around here. I'm wondering if anyone could give me some advice on the electrical issues I have with my suzuki gs850 1980 trike. I put a new battery in and the starter solenoid went. So new solenoid and a relay. I'm having issues understanding how the previous owner wired the 5 pin relay up. Pin 30 and 85 has a jumper, 30 going to one side of the solenoid, 86 going to the switch on the solenoid and 87a to starter button. How ever my understanding this isn't how the relay works? I've tried it and can't get it to work wired like that.
Attachments
IMG_20210427_215926.jpg
IMG_20210427_215926.jpg (41.29 KiB) Viewed 2636 times
IMG_20210421_124039.jpg
IMG_20210421_124039.jpg (103.07 KiB) Viewed 2636 times
Adamski123
Posts: 5
Joined: Sun Apr 25, 2021 10:00 pm
Location: Basingstoke
Has thanked: 1 time
Been thanked: 1 time

Re: Need help electrical suzuki gs850 1980.

Post by Adamski123 »

Okay so not very professional :lol: but this is how I'm going to try and wire the starter up.
Attachments
IMG_20210428_081449.jpg
IMG_20210428_081449.jpg (40.62 KiB) Viewed 2631 times
redbikejohn
Posts: 2158
Joined: Wed Aug 04, 2010 4:01 pm
Has thanked: 2 times
Been thanked: 83 times

Re: Need help electrical suzuki gs850 1980.

Post by redbikejohn »

I had a 850 back in the 80's , loved it. Would have another now if I could.
So why are you using a relay and a solenoid? Seems a bit redundant as you could just bring in the solenoid from the button? Which Is how the dirt bikes i work on work.
Yamaha tenere 700
XT660Z written off from behind by car.



Check out www.redbikejohn.com for ride & race reports (enduro, H&H etc).
steve the grease
Posts: 298
Joined: Fri Jul 01, 2016 1:56 pm
Location: Ger Abergwaun
Has thanked: 8 times
Been thanked: 101 times

Re: Need help electrical suzuki gs850 1980.

Post by steve the grease »

Those numbers are standard bosch wiring terminal numbers - all german ( and other) wiring diagrams use them . a quick google search for "Bosch terminal numbers " will bring up various responses including :https://www.autoelectricsupplies.co.uk/ ... ations.pdf All the terminal numbers can be read off . Briefly
30 live supply batt+
85 'actuator'
86 'start of winding'
87a 'first output'
basically if you put 12v across the terminals eventually 2 will make it click -they go to the starter button and earth
The other two connections are the circuit you are controlling

Relays seem to come in 2 types #1 12 oclock and 6 oclock are one pair 3 and 9
the other .
#2 12 oclock and 3 oclock are one pair 9 and 6 oclock the other.
Does this make any sense.
Dark Knight
Posts: 1025
Joined: Fri Apr 01, 2011 8:46 am
Been thanked: 99 times

Re: Need help electrical suzuki gs850 1980.

Post by Dark Knight »

The relay and solenoid idea.
The starter takes 100,s of amps, we have not yet moved on to using phasma to making the solenoid redundent.
We need the solenoid as the relay contacts cannot carry that level of current.
So we are using the relay to operate the solenoid.
Adamski123
Posts: 5
Joined: Sun Apr 25, 2021 10:00 pm
Location: Basingstoke
Has thanked: 1 time
Been thanked: 1 time

Re: Need help electrical suzuki gs850 1980.

Post by Adamski123 »

Thanks for the replies guys 🙏🙏 also thanks for the link for the relay layout. I'm sort of understanding the route I need to take for the relay. What I don't understand is how it ever worked with the way it was wired before I got it? I was hoping to have a go at it today but its been non stop raining :cry:
ErikGustav2
Posts: 578
Joined: Sat Feb 23, 2019 7:18 am
Location: Albufeira-Portugal (Dalarna-Sweden)
Has thanked: 159 times
Been thanked: 739 times

Re: Need help electrical suzuki gs850 1980.

Post by ErikGustav2 »

I operate the solenoid direct from the starter button.
No relay is needed.

The current that passes the starter button is only used to operate the relay inside the solenoid.
Low current.

The hisg current goes from battery via solenoid to starter engine.
Use thick wires !!!
And do not foget good earth

Good luck
Thedktor
Posts: 1138
Joined: Wed Oct 17, 2012 1:44 pm
Has thanked: 165 times
Been thanked: 159 times

Re: Need help electrical suzuki gs850 1980.

Post by Thedktor »

You don't normally use a relay to operate the starter solenoid - the relay is probably to do with the sidestand switch, and can be bypassed. Below is the DRZ circuit diagram. Join Y/G to Y/B and off you go!
DRZ Circuit.PNG
DRZ Circuit.PNG (140.64 KiB) Viewed 2411 times
- Steve



Southampton area

DR350, 349, DRZ, 701
User avatar
Snaf MKII
Posts: 698
Joined: Thu Nov 21, 2019 2:57 pm
Location: Simms Hill
Has thanked: 918 times
Been thanked: 751 times

Re: Need help electrical suzuki gs850 1980.

Post by Snaf MKII »

That looks like it was possibly an alarm relay, the jumped terminal are where the alarm was removed.
ErikGustav2
Posts: 578
Joined: Sat Feb 23, 2019 7:18 am
Location: Albufeira-Portugal (Dalarna-Sweden)
Has thanked: 159 times
Been thanked: 739 times

Re: Need help electrical suzuki gs850 1980.

Post by ErikGustav2 »

One of many diagrams

http://smokeriders.com/diagrams/Suzuki/ ... GT,GLT.gif

No relay included (besides the one in the selenoid)
Post Reply

Return to “TECHNICAL”