I was hoping to get some advice as to where to start fault finding.
I noticed about a week ago that the horn wasn't working. It made a pathetic 'whimper' and nothing since then.
Then today, on the way into town, I noticed the fuel gauge reading was 1/4 full. When I came back to the van I was surprised to see it was reading 'empty'. Tried to fill it up at garage but was full after only 25ltrs. On the way back it started to read 1/2 full but gave up after a few mins and has returned to reading empty again.

I am not sure if the 2 incidences (horn and fuel gauge) are connected.
Any advice would be greatly appreciated.
many thanks
ps. forgot to mention that the steering wheel is wooden ( a replacement at sometime).