One thing that annoyed me on my camper was the lack of an intermittent wiper option, especially when it was spitting. (Everybody in. It's spitting!!!!)

I could only put the wipers on continuous and I discovered that in their wisdom VW rarely fitted the option on early vans and even ommited them from later vans even though they installed the wiring. Here's a guide on how to fit the option to an early T25 (mine is a 1983 model with ceramic fuses).

There is a guide to the easier method of installing it to later blade fuse models here.

First job is to get down to the scrapyard and pick up relay number 321 955 531A (as in above picture). These can be found on most 1982-90 VW's, they also have a big 19 stamped on them. I got 3 from my local scrapyard for £5.

Then remove the white retaining clip as shown in figure 1 to 3. This will now give you a third intermittent down position on your wiper switch arm.

Fig. 1

Fig. 2

Fig. 3

Right now for the wiring. I consulted the Benltey wiring diagram (fig. 4) which shows the relay as it should be incorporated in the system. Being lazy I couldn't be bother to wire the relay up so it fitted in the relay fuse box so i wired it up next to the wiper switch on the steering column.

Fig. 4

After removing the wiper switch harness (fig 5 and 6) I noticed that the terinals were marked like the above diagram.

Fig. 5

Fig. 6

And from that I came up with the following diagram of what I was going to do. (fig 7)

Fig. 7

NOTE: Position J in the indicator switch has no connector or wire to it so you need to create one. The easiest way is to purchase a 1/8" female lucar connector as shown below. This when crimped will push into the switch plug and lock in place. Feed your wire through position J (the way it would be if it were being connected to the indicator switch), crimp the wire to the lucar then push the lucar back into the J position in the switch connector blcock

1/8" female lucar connector

Figure 8 shows the relay wired up.

Fig. 8

Now all I have to do is secure it to the steering column and replace the steering column cover (fig 9 and 10)

Fig. 9

Fig. 10

Reconnect the battery and you will now have intermittent wipers that will also wipe 4 times when you activate the screen washer.

GOOD LUCK!!

Ammendment:
If your not quite as lazy as me you could wire the relay to the proper relay mounting position situated by the fuse box. All you need are the correct lucar connectors which will secure themselves in the relay mounting bank.