Does anyone have any manuals for a 1986 JCB 525b tele

[gensetsteve]

As description

[Tyz05]

Might have one at work, boss used to work for JCB. What do you need to know?

[gensetsteve]

I need to buy a set or at the least get a diagram for wiring under the dashboard.

[Tyz05]

Fairly basic under the dash, whats the problem? I'm guessing by your post in the other thread that it's not charging?or not starting?I work on them regularly might be able to point you where to look.

[gensetsteve]

Fitted new alt not charging but 12v present going into small wire on alt. Buzzer been going for years while alt stuffed. Tonight give panel a pull about and replugged in connectors on back eventually buzzer goes of and 14v present. If I can get a drawing would feel better about pulling dash about. Its a right mess with added bits for beacons and fans etc. No warning lights at all and head lights work when they feel like. Wants a bit of time and tlc. I would like something abit more tidy but that involves spending 10k plus with more electronics to go wrong

[Tyz05]

I've got no access to the workshop till new year coz the boss is on winter hols. I'll have a look asap,see if I can get a copy of the wiring diagram and fuse panel. The main problem with the electrics on them is the large multi pin plugs in the loom,the tiny connections normally fail. I take it the battery light comes on? Did you measure the voltage on the little wire while it was connected to the alternator or unplugged?

[Joy Yeomans]

steve i will ask one of our lads who worked for JCB and knows them inside and out, i know some later ones they used all yellow wires which are a real pain to try and find what they all go to! joy

[gensetsteve]

I've got no access to the workshop till new year coz the boss is on winter hols. I'll have a look asap,see if I can get a copy of the wiring diagram and fuse panel. The main problem with the electrics on them is the large multi pin plugs in the loom,the tiny connections normally fail. I take it the battery light comes on? Did you measure the voltage on the little wire while it was connected to the alternator or unplugged?

 

The small wire going to alt was unplugged but showed battery voltage when ign turned on. I have now got alternator charging but have a feeling when I screw dash down or go over a bump things will take a turn for the worst.

[gensetsteve]

steve i will ask one of our lads who worked for JCB and knows them inside and out, i know some later ones they used all yellow wires which are a real pain to try and find what they all go to! joy

 

Thanks Joy anything would be better than I have now.

[Tyz05]

If it gives further trouble test the small wire voltage with it connected by probeing the back of terminal, it should still read 12v ,if there is a poor conection in the circuit the voltage can drop when under extra load. If the voltage has droped The problem is normally located at the dash,ie bulb or fitting or the loom harness conections. One of the loom conectors being at fault would explain loss of other systems,lights, charging and forward/reverse if fitted with power shuttle are all common to this fault. If you ever see one of these plugs apart you'll see why.